Cannot control volume of internet calling apps since last update
Since the last update, I cannot increase or lower the volume of internet calling apps (WhatsApp, Threema, Duo) on my ZenFone 7. The volume is stuck at max and the volume key has no effect: the up key brings up the slider but does nothing. The low key does absolutely nothing. I've tried changing all types of volume (call, media, etc) and have zero effect. This happens with and without loudspeaker on.
This is very problematic for me as everyone nearby can now hear my calls.
ZenFone on 188.8.131.52