Multiplayer crashes and massive lags

Bug Reporting Hub Crashes (CTDs)
, , , , ,
1

Description of the issue:

We do regular group flights and several people have had crashes when loading on to the runway at the same time as others.
Just today more than 5 people in our group had a CTD after spawning on the runway.

FREQUENCY OF ISSUE

This happened every group flight we did since SU2 was released.

REPRODUCTION STEPS

Please list clear steps you took in order to help our test team reproduce the same issue:

  1. Choose the same server as other players
  2. Choose the same airport and runway as other players
  3. Click on start flight at the same time

YOUR SETTINGS

If the issue still occurs with no mods and add-ons, please continue to report your issue. If not, please move this post to the User Support Hub.

What peripherals are you using, if relevant:

[PC Only] Are you using Developer Mode or have you made any changes to it?

[PC, MSFS 2020 Only] Are you using DX11 or DX12?

[PC Only] Many issues may be due to an outdated graphics card. Please state your Graphics Card Driver Manufacturer (NVIDIA, Intel, AMD) and Version:

[PC Only] What other relevant PC specs can you share?

MEDIA

Please add a screenshot or video of the issue occurring.

[END OF FIRST USER REPORT]

:loudspeaker: For anyone who wants to contribute on this issue, Click on the button below to use this template:

Do you have the same issue if you follow the OP’s steps to reproduce it?
•

Provide extra information to complete the original description of the issue:
•

If relevant, provide additional screenshots/video:
•

1 Like
2

Do you have the same issue if you follow the OP’s steps to reproduce it?
• yes, exactly

Provide extra information to complete the original description of the issue:

• Have been flying MSFS 2024 with no issues multiple times today effectively as a ‘single’ player, i.e. VFR from random airfields without other players near the same airport.

  • Spawned into our multiplayer flight today and for the first time, the sim froze AFTER loading into the airport but BEFORE being able to hit the ‘fly now’ button. I.e. the sim was totally unresponsive with the ‘loading circle’ frozen, for over a minute, until I decided to kill the sim.

  • Used task manager to kill the sim, and tried to load a second time - same result

  • Used task manager to kill the sim, this time loading into an airport 150km AWAY from the other multiplayers. This time the sim loaded absolutely fine and I was able to slew over to the other players

  • It was evident throughout the flight we would get lag spikes when multiple aircraft were near each other - this is also new and may be related.

These issues are new (SU2) i.e. we have been flying multiplayer in 2020 and now 2024 without seeing anything like this.

3

Do you have the same issue if you follow the OP’s steps to reproduce it?
• Yes
Provide extra information to complete the original description of the issue:
• Had 4 consecutive CTDs when joining the MS Official Community Fly-in on 23 May 2025. I waited until the group was on the second leg and was able to spawn in at the departure airport without issue. Flew the remainder of the flight behind the group without incident. Empty Community Folder. SU2 v 1.4.20.0

4

Do you have the same issue if you follow the OP’s steps to reproduce it?
• Yes

Provide extra information to complete the original description of the issue:
• Had 1 CTD when joining a group flight and in another group flight had lag (1second stutter) multiple times when near other players. This only happened to me on SU2. Did not happen before on MSFS2020 or earlier versions of MSFS2024.

5

Do you have the same issue if you follow the OP’s steps to reproduce it?
• Yes!

Provide extra information to complete the original description of the issue:
• Did a flight with about 10 friends on thursday, during the tour excesive stutter starts, felt like 1 frame / sec.
Currently AndyanerTV is streaming his 92nd Community Flight and lot’s of the participants report CTDs on spawn and excessive stutter.

If relevant, provide additional screenshots/video:
• -

6

Same problems (stuttering and CTD ) with Multiplayer on.
Multiplayer off it works without stuttering or CTD. Multiplayer is on I have massive stuttering or CDT.

8

Thank you for the bug report.

We have created an internal ticket to see if our team already has this logged, and if not they will attempt to reproduce the issue and create a new bug report. This item is now marked as feedback-logged. If there is an existing bug report or one is created, we will move this thread to bug-logged.

9

For those experiencing this issue, please may we ask for more information to be included, specifically the Fault Bucket ID associated with this CTD. If you’re unsure how to find this, please see our forum post here: How to find your Fault Bucket ID after a crash [PC] - Bug Reporting Hub / Crashes (CTDs) - Microsoft Flight Simulator Forums

Thanks
The MSFS team

10

We did another group flight yesterday evening (in European Time Zone) with about 10 people.
I was early at the airport, 2 other guys have already been there.
No problems on my end.
When more and more people spawned in I suddenly had a CTD.
Tried 2 times to start the sim again and spawn on our departure airport. First try was an instand CTD, the second retry was sucessful. Maybe it was successful because the other already left the airport and about 20nm away.
I took off and I was able to cath the rest of the group. About 30 minutes later excesive stutter occured. Felt like 1 frame / sec! But only outside the airplane. Every animation in the cockpit was smooth (e.g. Throttle, Stick, Tablet animation). I then advanced from the group an the stutter was gone. Turning around and getting closer to the group, the stutter was back! This stutter always occured when I was about 5 - 6 nm away from the group. Outside this circle, the flight was smooth.
I did this several times an the outcome was the same every time.

Attachment:

image
image358×527 7.2 KB

11

Seems like the massive stutter is caused by wake turbulence, according to this thread:
https: // forums .flightsimulator .com/t/ wake-turbulence-causes-massive-loss-of-fps /713848/16
(Sorry, not allowedf to share links, simply delete the spaces)

Will test this tonight at the NY Event!

12

Linked:

13

Negative. I have wake turbulence disabled. Still had huge lags in vicinity of other players.

Not talking about low fps stutters, but the sim freezing for a second and then returning to normal performance. Other pilots in our group confirmed they experienced the same problem.

14

It might be emerging that we’re looking at TWO bugs here both of which are affecting multiplayer.

  • #1 is a FREEZE/CTD issue with multiple players spawning into the same location. This has been a serious new issue since SU2 which makes it impractical to hold online events with more than maybe 4 players from the same airport in MSFS 2024. Typically one of those players will start with what seems a normal setup and click the “Start Flight” button on the World Map, and the plane will initially load into the departure airport. Things look promising and the pilot is expecting (in our case) to see the towplane spawn and then will see the “Ready to Fly” button, but what happens is the sim FREEZES OR CTD’s moments before that “Ready to Fly” button would have appeared.

  • #2 is significant stuttering amongst the players after launching but still in the local area. This certainly seems to be likely when we are near each other, is new in SU2, and we don’t know the cause.

The fact both these issues are new in SU2 is possibly the main reason to suspect they’re linked.

Our temporary workaround for #1 has been to spawn into a variety of locations not too far from the planned multiplayer start and to slew over to that start area. We’ve had a mix of trials including spawning at other airports or spawning in the air at random locations - these seem to work but as the CTD hits random people it’s hard to be sure. Note these players typically have relatively stable sims, i.e. they expect to load in without an issue and the issues only occur for them on the multiplayer load-in, and loading some distance away has always been an immediate fix.

15

Just echoing what MSGamerTag01 posted which has been my experience exactly with both bugs happening. Spawning in the air nearby has worked most of the time but I have had CTD/total freeze happen in this instance too. None of this happened before SU2.

16

Because of this issue — and several others that continue to affect MSFS 2024 compared to the 2020 version — I’d estimate that MSFS 2020 is currently flown 1.5 to 2 times more than 2024.

This isn’t just anecdotal. On WeSimGlide.org, where pilots upload IGC files from soaring flights, we track which MSFS version was used. The data has been consistent for a while, and in fact, MSFS 2024 has been losing ground to 2020 since Sim Update 2.

image
image2000×1125 141 KB
18

I experienced 2 CTD details as follows:
1st. At commencement of a synchronised group(10+) glider task with 2024 + SU4, All using common preset weather, flight plan & local sim time. We all press on the start concurrently, For me as I pressed ‘Ready to fly’ the CTD happened.
2nd. Restarted 2024, reset up as before but advanced local sim time by 5 mins & started. Its unlikely that this time was truly a concurrent flight but may have been others starting late. As I press ‘Ready to fly’ I got my 2nd CTD.

Fault bucket 2246741447856942285, type 5
Event Name: MoAppCrash
Response: Not available
Cab Id: 0
Problem signature:
P1: Microsoft.Limitless_1.6.5.0_x64__8wekyb3d8bbwe

& Preceeding Error

Faulting application name: FlightSimulator2024.exe, version: 1.6.5.0, time stamp: 0x00000000
Faulting module name: ntdll.dll, version: 10.0.26100.5074, time stamp: 0x0e967e89
Exception code: 0xc0000005
Fault offset: 0x0000000000011755
Faulting process id: 0x6F18
Faulting application start time: 0x1DC24D880D29799
Faulting application path: C:\Program Files\WindowsApps\Microsoft.Limitless_1.6.5.0_x64__8wekyb3d8bbwe\FlightSimulator2024.exe
Faulting module path: C:\WINDOWS\SYSTEM32\ntdll.dll
Report Id: 9deab94e-f0bf-4803-9aeb-9933a324cbfd
Faulting package full name: Microsoft.Limitless_1.6.5.0_x64__8wekyb3d8bbwe

Earlier in the day SU4 was installed, and a glider flight completed with no issues.

19

Do you have the same issue if you follow the OP’s steps to reproduce it?
•Yes

Provide extra information to complete the original description of the issue:
•We all were on a discord chat and set the same weather presets, sim time, runway, we clicked Fly at the same time and 25% of our group immediately CTD. After restarting the sim and trying to join the group, a 2nd CTD followed. 2024 Doesn’t CTD for my system when not doing group flights.

If relevant, provide additional screenshots/video:
•

20

Do you have the same issue if you follow the OP’s steps to reproduce it?
Yes

Provide extra information to complete the original description of the issue:
B21s description of the problem is concise and consistent to what I am getting

If relevant, provide additional screenshots/video:
•

21

Do you have the same issue if you follow the OP’s steps to reproduce it?
Yes

Provide extra information to complete the original description of the issue:
I clicked Ready to Fly and got CTD. Tried a second time after 3 min and worked ok.
This was on SU4 beta in a glider multiplayer task.