Yep, when I turn the car onto accessory, the camera turns on and starts recording in driving mode. I also checked the battery wire with a test light and it turned on when my car was off.
I also didn't have the rear camera attached at that time. I assumed that that might be the issue, so I tried attaching the rear camera, and when I turned on the camera, the rear camera's blue light just kept blinking. I checked the real-time camera on the app, and the rear camera doesn't seem to be working, while the front camera was fine. At this point, I assumed I'd have to re-flash the firmware on the camera, and in the process, I dropped my microSD card under the seat and can't find it T_T I'll try again tomorrow when I get a new one...