If it helps (for anyone devs actually listening) I noticed two things,
Anyone else use Bluetooth headsets and loose ATC?
@FormerShelf5581 Yeah same here I have no choice but to let AI handle the ATC otherwise no ATC guidance i.e my Ifr plan gets canceled.
Agree
Loss of ATC comm and flight plan canceled
@AviatorDown8227 when the forum only gives you like 5 votes it’s hard to decide which is most important
I think that is because you have not been here long enough/contributed enough. When you have been here longer and accumulated more badges you get unlimited votes which I think comes with the active member badge.
Same issue here after SU11… 
Still happening in Cessna 172 G1000. I can’t confirm other aircraft at this time.
November 2022. Sim Update 11.
Also happening here right now.
Fenix A320 EHAM to EDDB
Can only read ATC but hearing nothing
I didn’t seem to have this problem with SU9 or SU10 but it seems like it is back with SU11.
I didn’t have this with su9 . Was intermittent with su10. So far with su11 4 IFR flights (2 pmdg , 2 fenix) and all 4 the ATC dropped on the controller side . I can hear my voice but their voice was gone and when they did speak (which you can’t hear) their text speech was in ATC menu but never auto popped up in subtitles at bottom screen, I had to randomly open up ATC menu to see if they were speaking to me before my IFR plan dropped (or keep the menu open on screen entire flight). Once again , another frustrating bug with a new update
But i would guess it’s also Server related. Because it’s the first time with this issue in SU11
ATC lost on taxi to runway after 40 minutes of flight preparation. Had to shut down the sim. Now I can’t do my flight because I have run out of time. Infuriating. It’s always something with this sim.
Just restarted the sim to do a shorter flight. Guess what? No ATC.
Some say delete all 40th anniversary planes. That seemed to help me. I read the new planes are bugged and cause sound problems
Well, that would be a big problem. On Xbox we can’t delete them..
Doh, I just checked back here to see if the 40th anniversary edition was worth coming back for. I guess not. Still the same old problems with new ones on top. Oh well, it will all be fixed some day.
At CYLW trying to taxi to runway. After pushback, there’s a plane on the taxiway, so they ask me to hold. I hold, but when I go to external view, the plane doesn’t even move. I then taxi via the ramp to get past the plane that just stops. Normally, ATC will say continue taxi, but not this time. ATC goes silent. I continue my taxi. When I get to the runway, no option to ask for takeoff clearance, so I just go and it cancels my IFR. I restart the sim. This time, there’s a plane coming into the ramp, but ATC asks it to hold. I again taxi using the ramp to get to the next available taxiway, but the plane doesn’t move, so I had to end the sim. because ATC also goes silent. Asobo should have waited for this 40th anniversary and fix the ATC.
Third time’s the charm? Not this time. So I get to the runway at CYLW with no intervening taxiing planes. When I get to the runway, Azure goes down after my copilot asks for takeoff clearance. Nothing. I had to switch to ground and then back to tower before my Copilot acknowledges the takeoff clearance.
When I get to my destination and ATC vectors me to a waypoint, I go there, but the sim doesn’t seem to recognize that I got there. I circle around and it still doesn’t recognize it. I figured, okay, forget it and I’ll cancel IFR. No go. All options are grayed out. I had to switch to Com 2 and back to Com 1 before all the options are active.
ATC is exceedingly terrible today. All the usual problems are happening much more often today.
As I have mentioned several times on this topic since July 21 when it was opened, this is usually a sign of exhausted Azure resources. I had to switch to COM2 and do sim restarts for each flight, and it still acted up in what seemed like record time today.
I’ve noticed recently that the loss of ATC voices issue occurs when I hear the bugged ATC voice with no radio effect on it (so that it sounds like they are in your cockpit with you).
If I then switch to COM2 in the ATC window then the incoming voices come back. I noticed that at first the COM2 window shows a different radio freq, but it quickly corrects itself to the current one.
However, if the voice with no radio effect happens again then that’s it, I’m stuck with no incoming voices at all again.
I cannot complete one flight now without losing ATC. Rebooting and restarting makes no difference. Often ATC fails right after clearance is received. Sometimes AZURE has disappeared as an option in ATC Text-to-Speech. Basic features of the game should be the highest priority before additional content.