volume suddenly goes to maxiumum
Fedora 34, recently upgraded from Fedora 33, switched from pulseaudio in Fedora 33. This issue never happened in pulseaudio. This issue did happen in Fedora 33, but I was only now able to capture the event.
I took a snapshot at 18:45 EDT, and then again at 20:06 EDT immediately after the issue occurred, and before I adjusted the volume. Was playing Guild Wars 2 under Wine at the time, as you should see from the dumps.
I have an external amplifier and 40W speakers, so this was quite exciting. After taking the snapshot, I used the media keys on my keyboard to reduce the volume, and a single press reduced the volume to normal ... and the attendant OSD popup confirmed that it was NOT at 100%. Everyone in the house at the time confirmed that is was at 100%. Although I didn't ask them, I'm sure everyone in my neighborhood would have agreed.