App working perfectly fine here on Pixel 5, stock Android 13, latest cleanslate kernel.
Same here. I solved FC's by switching to "notification mode: always", so Android keeps the app in memory.
Using it on lineageos 19 (a12) oneplus 8T it works but with 2 problems. It won't detect the light sensor so I have to manually put it in sleep mode. Also, it won't control the lock screen so I'm blinded each time I open or close the phone. Otherwise it's great and I'm glad it is still available.