(Already reported, just adding for reference)
Vaulted Ceiling (single) blocks movement from the ‘wall’ side, as if an invisible piece of structure sticks up above the visible area. This can be jumped over or edged around, but stops movement each time it is run into. It also creates an unclimbable ledge if it is directly climbed on.
Seems to apply to this piece in all sets I have tested - Stormglass (as in the video), Arena, Argossean, Nemedian (and presumably any others that I am missing/forgetting).
See also this topic