It looks like some part of the Onyx custom power logic lost its mind.
It could be that something on your device is corrupt.
I'd do a full update if you can.
Your data should be safe if you don't wipe.
Code:
Model: Page (English)
Finger: Onyx/Page/Page:11/2024-09-11_03-46_3.5.4_fbdec6b69a/47380:user/release-keys
Link: http://firmware-us.boox.com/e275d1c30d46c00585188fb00127acde/update.upx
Size: 1,766,411,105
MD5: e275d1c30d46c00585188fb00127acde