Don't tie the clove hitch one-handed when working with auto-breaking belay device, that caused fatalities. Use both hands to tie the full knot first, and then clip it in at once:
some of those failure modes when i first saw them were freaky, they were so insidious and easy to do by accident! really glad i came across them, and thanks for sharing!
https://www.youtube.com/watch?v=s9np7B1Zao4