ATC keeps telling AI traffic to descend or climb a few hundred feet because ther actual and indicated altitude are different. The strange thing is the AI fly at the real alt where they are supposed to be. ie 30000 ft, but their indicated alt is 30300 ft , (ATC should have no idea about this :_D ) yet ATC keeps telling them do descend to fl300, ofc the AI is there so they do nothing.
This result in ATC spamming everyone in their sector to change alt.
Needs a fix because ATC is VERY annoying after 10 minutes. Please VOTE on this
It is annoying…but I’d rather fly IFR with ATC than without it.
As FS also understands SIDs and STARs, its ATC is better than the appalling ATC in Xplane.
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I’m flying with ATC as well, but the spam is annoying. Please vote, this needs to be fixed to protect my sanity 
I’m in a 2 hour flight and that Airbus was instructed to descend to FL300 like 50 times now, he is flying parallel me so He wont go away anytime soon
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Dont know if it’s connected, but it is not only for AI. These days I’m flying IFR over the west coast of USA, using low altitude airways, and ATC commands me constantly Yo-Yoing +/- 1000-2000 feet.
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That is a different issue, and there is another topic about it. Happens to me too. Also ATC will send your to your flight plan altitude at the beginning of an approach even if you asked for a different altitude. I had to ask for a 5000 ft lower alt in cruise because of ice and as I arrived ATC wanted me to climb back up just to descend again.
There are several atc issues, this one is only about the ATC spam commanding AI aircraft to change altitude because ATC and AI use different altitude in the code (indicated vs actual).
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ok thanks, sorry for being offtopic
I also find the incessant commands from ATC to AI traffic annoying. It can be hard to get an acknowledgment in at times.
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I had the same issue yesterday as you have described.
The Flight plan was for 20K (TBM) ceiling, I requested four different lower ([Decrease]) altitude changes down to 2,400 feet before the arrival airport and all went well.
60nm out from my airport it told me to go back up to 17K feet! I was flying over the ocean the entire way into the arrival airport so nothing was in the way and ATC had no reason not to allow my altitude changes to the flight plan. I was flying in a non-public session, by myself.
The 17K feet came from a waypoint that I had already passed by earlier so the ATC program is not following the “changed” flight path that it allowed to be followed.
This game , yes game , because this is not a simulator , it’s totally bullsiht : autopilot its not responding at all , ILS system doesnt work , ATC instructions DOES NOT MATCH the FMC/FMS , Cessna 172
right display shuts down durring the flight and so on… wtf ? What I payed for ???
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And how does your post help THIS issue ? please vent on general, this is off topic here…
I made the topic and the topic is about only the ATC spam bug.
thx for the vote
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On a 5h trip with the Longitude (back then when it was flyable - priot to 1.8.3.0) from Nice to Dubai, ATC yelled at almost every available AI flight that it was either 20k feet above or below its assigned altitude. 
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Ye but that is another problem with live traffic, and form my last few flight it sound like that one is fixed.
What I’m talking about here is just a 200 - 400 ft difference because of the air pressure or transition altitude or indicated or real altitude, pick your poison. The AI is at exactly FL200 for example, but its indicated altitude is 20300 ft, so the ATC keeps telling it to descend to FL200, and the AI does nothing because it is already there, so the ATC keeps telling him.
I’m watching this in Little Nav map, AI have 2 altitude, indicated and actual. Actual is exactly as instructed by the ATC but indicated can differ, the problem is that ATC is watching the indicated instead of the actual.
Looks like an easy fix for Asobo, it just need some traction here.
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Right. I have heard ATC asking for thsese small changes in FL just yesterday.
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It happens only if the pressure is different enough from standard 2992. So the altitude difference is bigger then 200 ft.
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I am going nuts with this exact problem as I write. ATC keeps telling an AI airbus that they’re 300 feet above assigned altitude and to expedite descent to FL200. I’m flying the 787 from KJFK to EKCH and the barometer (below 18K) is 29.52. If I customise the weather to standard 29.92, this immediately stops the annoying ATC rant.
But that isn’t a fix. It’s only a remedy.
As a R/W pilot, I know that transition altitude differs from country to country. For example, in Australia, transition altitude is 10K feet - once you climb to 10k, 29.92 is standard. In the USA, transition altitude is 18k. FS 2020 assumes 18k is standard everywhere. Yes, you can change things in options to not use the USA measurement. But it doesn’t change anything with regard to the standard transition altitude being 18k. I doubt this can be addressed in sim.
May I suggest a change in code that sets EVERY AI aircraft above 18k feet barometers to 29.92 (1013hpa). Don’t bother about other countries transition altitude. Leave it at 18k… Either that or get ATC to recognise all aircraft 18k feet or above to have baro set to STD. Can’t be that hard to do either. Can it?
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It happens all the time if several ai aircrafts flying around.