So far I have noticed:
- radio altimeter callouts not working
- logo light not working
feel free to add stuff
Sounds missing:
- Radio altimeter callouts
- GPWS
- Buttons/switches
- Basically all audible warnings with few exceptions.
Also, the aircraft freezes during loading most of the time.
Not even the missing sounds? Did you check that?
Flip a random switch and say if you heard any sound from it. And upon landing, say if you heard the radio altimeter callouts.
Modified title and added [SU6 Beta] just to help ensure that any SU5 bugs are not reported here. 
So far, I can confirm the issues with the sound on the various switches. Nothing can be heard, but on the 5.1, audio was audible. What a shame… I’d be curious to understand what could be causing such a strange sound issue.
Can’t verify since I’ve reverted to SU5.1, but I’ve seen reports on other forums that after the SU6 beta update, Ifly 737 MAX no longer freezes during loading (after deleting WASM files), but still has the missing sounds bug.
I can confirm that the new update makes sounds work properly again (don’t ask me how!).
Confirm too.
Yes, seems happy again. Thanks to team iFly for whatever they did.
Just joined the SU6 beta again, and yes, I can confirm the sounds are all working now.
After updating to v1.1.0.3, the frequent crashes I was experiencing when loading the aircraft in SU6 beta are completely gone.
I confirmed there were no crashes and no performance drops even after reloading 20 consecutive times across 5 different airfields.
Big thanks to the iFLY team!