Memory card compatibility are most often down to the controller on the memory card and not so much the actual speed of the cards.
I have had 30 MB/s memory cards not work in a camera ( a camera that writes like 5 MB/s ) but a 45 MB/s card worked, but judging on write speed both cards should have worked just fine, but that was just not the case.
I have also a single time had a memory card that did not work in a camera, but worked fine in others, but the kicker was another memory card 100 % the same,,,,, well it worked fine in that one camera the other card did not work in.
But that was a freak,,,,,, something.
Just like i have been able to make the wifi in a dashcam not work, or rather it is working just fine broadcasting,,,,, but no way in hell can i connect to it with any devise or any firmware / bootloader.
But again i am the only one that have been able to pull that off, and otherwise the camera function 100 %
And i swear i have not done anything freaky to that camera as i do not have the skill for doing such things, and the wifi also worked just fine for the first many weeks.