Count yourself lucky! My cams start getting buggy once the SD card is full.
The video is fine in
Blue Iris, but when I go into the Camera GUI it will start being unresponsive when I try to make any changes or do things like not show the IVS when I want to see it, etc., so I am like oh I bet the card is full, so I reformat and the responsiveness comes back.
Maybe I am in the camera GUI too much tweaking LOL.