This option from the very beginning of its existence needed more work to make it work correct and this was never done. This option was working fine during continuous playback, when there are no skipped frames, but it was failing when AV-sync of framedrop was enabled. It was never working correct when jumping between frames, including rendering on a farm which usually does frame-range based rendering. With copy-on-write things became even more tricky, since the "stuck" flag was never preserved between re-evaluations. Fixes T65683: Sticky Option in Floor Constraint for Bones Not Working