My card that's maybe incompatible is this one
Records fine for 10 mins and then camera goes into boot loop. I have another camera (same model) that i'm testing with a different brand card (Transcend 64GB Premium Micro SDXC Class 10 UHS-1) to see if it can last 1 hr recording. If that works I'll try that known good card in this camera and then try this card in that other camera.
edit:
Camera 2 has recorded 1 hour on the new card. So now to test camera 2 with the sandisk to see if its the camera or the card.
Also camera 2 produced 2 files on the root of the SDCARD that camera 1 never did.
files are attached to this post
edit2:
Confirmed the card is not compatible, the transcend card is working fine in the "bad" camera.
Also card is fine as i tested with 55GB of data on PC (h2testw), hash is fine for files so card is perfect, just NOT compatible with this camera