1) i use sfx on xperia x compact with g7's patcher. i believe this error happens on xperia x as well, but i cant retest it now
2) i have the lock screen disabled with: mcetool --set-display-off=unblank,tkunlock


when i unlock the phone with the power button, if the camera app is open, the WHOLE screen stays completely black (not the viewfinder bug, which i have gotten in the past and is completely different).

the only way i can even tell that the phone is unlocked is that i can swipe the camera app away (left/right, or close it from the top, or bring down the top menu, or bring up the bottom apps list, etc).

only the camera window is black. if i swipe away partially, i see the wallpaper, and if i let camera come back into focus, the camera app window is still completely black.

if i swipe away and come back, the camera app is working perfectly, even without closing/reopening.

if i use the unlock screen (--set-display-off=unblank), then the issue goes away completely

i can take pictures with the camera physical button, but cannot interact with the UI controls.

it happens reproducibly, every time. it only started with 3.0.1. (i have always disabled the lockscreen).

jolla-camera prints this error to STDERR 5 times when the issue happens:
QEGLPlatformContext::makeCurrent: eglError: 3009, this: 0xffffffff