This only happens to be in the Bastille room and its happened about 5-6 times now. Everything will be fine and at around :27 to :24 seconds left the fireworks stop and the mice stop and i don't respond when the timer hits 0:00
leaving the room and going to another one lets me start playing again but now i only dread when i enter that map :c

same it happends to everyone

try deleting your cookies

it must be lag..

Deleting your cookies will do nothing.

As Jonach said, it's happening to everyone. There's no known fix outside of relogging, or as you said, leaving the room.