Blackvue 750x-2CH keeps restarting

Recently started having issues with my Blackvue DR750x-2CH.

Installed in 2021 and was working fine until a few months ago. Up till then, the car has been parked in a garage (but also consistently parked outside on hot SoCal days with no issue). Starting from a few months ago, we started leaving the car outside of the garage.

It started having this problem where the camera would keep restarting when the car is turned on. I'm not sure if it's too hot or not. I've changed the SD card (Sandisk high endurance) but still had same issue. The weird thing is if I unplug the rear camera, it works fine. Any idea what's causing the issue?