I've posted many times that these latest dashcams/firmware are sdcard heavy and you really need to find the fastest card you can. At least U3. I'm not convinced that these endurance models are always fast enough or have the right technology.
I also seem to recall a post, ages ago, that said not all cards are built the same way. Different nand, vnand or something and some don't play well when asked to record video.
I remember Nextbase saying time and time again after extensive testing that their cams don't work very well with Sandisk for whatever reason.
I bought my V3 within months of its release and I'm still running the same Samsung Evo Plus 128Gb card, without issue, that had been running in a Nextbase 412 then 380 before that. And I'm running 60fps, high bitrate.