I have this problem, maybe somebody had the same issue. My A1 Mini is working fine for the first hour of printing until the program restarts in an Intervall of 5 seconds. The printing stops for 1-2 seconds, but the interruption leads to pimples on the model. I’ve tried to use an older firmware to solve the issue, but nothing worked yet.
Here you can find the video regarding the issue:
https://www.reddit.com/r/BambuLab/s/TLtzgpmeNm