What are you settings for video recording? I have the 128GB Lexar 633x (Verified good card) and on the newest firmware, setting the recording to FHD 30FPS front cameras x HD 30FPS rear camera at Highest picture quality setting, I get a bunch of 13 second video clips and stuttering/missing frames from time to time as well as gaps in the recording.
Reverting back to the original 16GB Blackvue branded OEM card, there are no issues with the same settings.
I did note that while underground in a parking garage when there is no GPS data being recorded, the memory card appears to work fine, but the moment it starts recording all the GPS and telemetry data to the card, thats when it starts to freak out.