Awesome, I’m happy everything worked for you 
Somebody on the forum discovered it some time ago. There are answers for all the problems on this forum, I’m pretty sure we’ll find the answer to life, the universe and everything at some point in the future 
There are certainly some libraries missing, you would have on a stock install. The normal mode also lets you select several filters, my guess is that those might be crashing it, but I haven’t had the time to look at it really. Edit: Well, that happens if you take ages to write an answer, someone will provide the actual one 
Mainly if everything worked fine with the permissions.xml and the SYSTEM_CAMERA permission was not only requested…
FP4:/ $ dumpsys package com.fp.camera | grep SYSTEM_CAMERA
android.permission.SYSTEM_CAMERA
android.permission.SYSTEM_CAMERA: granted=true
…but also actually granted.
Am I understanding you correctly that this workaround wouldn’t be necessary if the camera app was actually meant for A12, since it can’t handle that behaviour, or is there something else going on I’m not getting?
Should this be fixed in the FP Camera app once the FP4 officially moves over to 12?