When leaving a world while a Ceremony is running and loading another one, the Ceremony HUD will remain on the screen, with the time bar stuck in place (but jittering due to the partial ticks).
Happens with singleplayer worlds and multiplayer servers.
Observed in both 1.19.2-0.12.7 and 1.18.2-0.12.7.

This also happens when switching dimensions.