If below is true and the memory card effects timer precision causing confusion to the cripple timer...ie will be corrected with next firmware update so buy up those ProGrade cards and stick with 1.00
"There is one other significant difference that might prove more interesting than the meat drawer. Yesterday's experiment was with a Sony CFE card. Today's experiment was with a ProGrade card. In today's experiment he actually ran out of space after 60 minutes of recording on the ProGrade, so he then switched to the Sony card. Just before the switch the camera was reporting near 0:00 available video recording time left (thermal indicator, not card space). After he switched from the ProGrade to the Sony the camera immediately jumped up to 15:00, and provided 15 minutes of recording before reaching thermal shutdown.
Another interesting CFE observation is the indicated available video time on the ProGrade is displayed with granularity to the second - for example at the start of the test it showed 24:23 (24 minutes, 23 seconds), whereas the Sony always shows the seconds field of zero (for example, 15:00, 10:00, 05:00). It's very interesting that the precision of the available time left (presumably based exclusively on thermals) would be different for one card vs another. This implies the thermal calculation may be based in part on the CFE interface and specific card, either due to differences in some field the card returns in a CFE/NVMe protocol or even more interesting, based on a thermal element of the card itself. More experiments will need to be performed to investigate this aspect."