Anthias works only 2-3 days on Raspberry Pi 4

Hello,
I have installed Anthias on four Raspberry Pi 4 devices (directly via the Rasbberry Pi Imager on the SD card).
All devices only run for 2-3 days, after that they show no image or a still image.
What could be the reason for this?
Would it help to install Raspberry Pi OS instead and then Anthias?

Best regards
Dane