Hello Levas,
I just try the last build magiclantern-Nightly.2020Jul08.6D116 and when I click SET button in the crop-rec menu on the advanced option nothing happen(but I don't really need it, it's just to report you the issue).
I also try sd overclock 240MHz and now my SanDisk extreme pro170/MBs card is able to handle the crop_rep preset continus (test only for 3min but it's enought for my use) .
I just try the last build magiclantern-Nightly.2020Jul08.6D116 and when I click SET button in the crop-rec menu on the advanced option nothing happen(but I don't really need it, it's just to report you the issue).
I also try sd overclock 240MHz and now my SanDisk extreme pro170/MBs card is able to handle the crop_rep preset continus (test only for 3min but it's enought for my use) .