Very Nice initiative, thank you for that!
For me the most annoying bugs on my volaphone 22 on Noble are:
It often looses celular data connection. I have to go to settings and switch from 3g mode to Lte/4g again to have access to internet again. I use dual sim.
Sometimes the phone will boot with only one of the 2 sim working or even none of them, and I need to reboot again. (On top of that if it boots with only the second sim, it will change all the defualt parameters to SIM2 in cellular config, and keep this even when the phone reboot with Sim1 so that I need to change it again each time).
Gps position does not work reliably in webview, seemingly because of a problem of orientation/compass (see https://forums.ubports.com/topic/11572/gps-location-does-not-work-anymore-in-webview-noble?_=1764026186209 )
Secondary things:
It's too slow to take a picture or video inside the camera app (too much delay), and sometimes it fails to record and won't let me record until I reboot.
The interface is sometimes kind of sluggish, or will freeze for a fraction of a second (or even few seconds sometimes), it's not very fluid or snappy. And it seems to vary, during some periods it seems for fluid and other very slugish, I'm not sure what explains it.
Other than this everything really works as a charm. I'm really starting to feel that I don't lack anything in the phone. It's way better for my everyday life than 6 years ago when I started to use UT as a daily-driver. I should mention that battery life is extremely good for me. One charge can last 48h +.
Ps: I did not mention QtWebengine upgrade because it's an already ongoing work, but it is clearly a priority for me as well.