lag after update

laksmialiyya​  A large number of lots seem to be breaking completely or partially these days.  There are multiple causes, and it's not always possible to figure out which one applies in a specific case.  If you want to try to rescue the lot, you could delete one room at a time to see what helps.  When you find the right room, backtrack and start deleting objects inside it.

Use "save as" instead of "save" (as you quit and reload after deleting each room), so that when you find the culprit, you can go back to your main save and delete only the problem object(s) in that particular room.