Boeing 737 Max performance degradation over time

ISSUE DESCRIPTION

Description of the issue:
The performance of the sim massively degrades over time when flying this aircraft in career mode (not tested in free flight). Flight starts with good performance, after 2-3 hours of flight everything gets horribly laggy and only degrades more over time. Did only see this issue so far with the 737. GPU is not the limit, VRAM is not full, RAM is not full. CPU seems to be too busy, causing constant stutters. A shame since the 737 Max would otherwise at least be somewhat usable which is a notable exception in this mess.

If applicable, which aircraft is experiencing this issue:
Boeing 737 Max

[PC Only] Did you remove all your community mods/add-ons? If yes, are you still experiencing the issue?
Yes

FREQUENCY OF ISSUE

How often does this occur for you (Example: Just once, every time on sim load, intermittently)?
Every long flight

REPRODUCTION STEPS

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

  1. Fly a career mission with the 737 that is >3 hours (real time, not whatever is shown in the mission selection screen)
  2. Observe performance degradation
  3. Be frustrated once again

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:
Valve Index, Honeycomb Bravo, Logitech Saitek Pro Flight Rudder Pedals, Brunner CLS-E NG Yoke

[PC Only] Are you using Developer Mode or have you made any changes to it?
No

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

[PC Only] What GPU (Graphics Card) do you use?
RTX 4090

[PC Only] What other relevant PC specs can you share?
i9-12900K, 64 GB RAM

MEDIA

Please add a screenshot or video of the issue occurring.
Violent stutters

[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:

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 have consistently observed this issue in Career Mode (haven’t tried in Free Flight) during flights where the simulator is running for more than three or four hours. When a similar length flight is flown in a shorter “real world” time using Sim rate x2 or x4, the issue isn’t perceived at the end of the flight. The entire sim “lags” and feels sluggish (going to a menu during the flight). Once the flight ends, performance goes back to normal.

My PC specs are: 5800X3D CPU, 64Gb RAM, RTX 4070 GPU

If relevant, provide additional screenshots/video:
• Not relevant.