I have a similar problem. According to the LED on the control panel, the entire unit restarts. The problem only occurs when the SD card is full. After formatting the SD card, everything works as it should. The problem will probably be at the moment when the recordings are supposed to start being overwritten. I can tell by the fact that the WIFI LED is flashing, which should turn off after the first 5 minutes according to my settings.
Well, today I found out that sometimes 1-2 minutes of recordings are missing, which are not saved anywhere. I tried installing the latest software, which I thought would fix the problem as described, but it still seems to crash occasionally. (As a temporary solution, I copied the contents of the card to my PC today and formatted the SD card)
SD card: Samsung 512GB EVO Plus microSDXC A2 V30
Firmware: 20241016.V04