Just tried a UHS II v90 card, low level formatted it, and no lagging at all at startup, no blinking red light, faster autofocusing and only tried it for a few minutes but no freezing. Hopefully issue solved... Thanks for the help!
I have the Canon R6 Mark ii, will try the class II cards... I usually take photos at 40 fps electronic shutter and thought that maybe it is an error occurring occasionally in the buffer transfer to the cards not completely before my camera is turned ...
I have had this happen with both the 70-200 and 150-600 mm sigma lenses. Seems to go away when I remove and replace my SanDisk micro adapter memory card. Usually happens when first starting up camera. I have had it happen with full size SanDisk car...