Photon crashes random


I having issues all over sudden with random crashes. didn’t really change anything. I pad air 2 on 15.7.6 with 16gb ram. also shows just disappear after crash. tried on iPad 9 and same behavior. what could cause the problem? hardware is running on own wifi without internet connection on an airport and showtec net 2/3 pocket dmx to wifi.

what I did so far.
fresh install iPad. new show and still crashes.

please help


I have noticed some crashes when editing shows with same sequences, frequently after deleting an object.
But for data loss, photon try to recover data after a crash and restore photon state 5 min ago before crash