That's unfortunately the worst card to be using. Lots and lots of reports of that card failing in high demand applications such as dashcams. Save yourself further hassle and upgrade.
You should notice that this is the upgraded A1 version, much better and designed for mobile Apps and manage a lot of small files. Yes previous version was absolutely rubbish.
Also as said, the card has been working fine until a couple of days ago when I heard for first time, slow speed card detected, and I suppose it is related to partition full problem on the secure videos side