Using an action camera in a car is likely the cause of your issue, I imagine it overheated... they are action cameras designed to be used outdoors, the air cools them, no air flow, they get hot and then go into thermal shutdown to protect the batteries and camera from damage. I actually quite like the camera segmenting footage, and at least with the GoPro the gap is seamless where as with the Insta360 One R and some other cameras, there is a gap between files. It is also better to have smaller files, in case of an issue, you should then only lose a single file if it corrupts, not the whole video.