TWRP doesnt work with asg8 and camera fw. This is the reasons why your phone reboot. So flash twrp optionally if you need it and let it be on patched stock recovery if you need the camera. Maybe samsung releases the asg8 kernel sources, the we can be permanently on twrp with newest asg8 kernel. This is mostly the same process when samsung update the camera fw. But normally not every month.