This is only happening to me in a household with an infant or toddler. It's only cheats requiring testingcheats true. It doesn't happen if I'm just using MOO. The only thing I can do is exit to Manage Worlds and remove testingcheats then go back to the household. I'm on Xbox Series X with all content installed. The cheat menu goes white and won't close. Each time it's happened it's because I'm trying to add skills or traits to a parent but I can't because the screen is frozen. It's fine on other households, it's just households with very young children.
Update: this seems to be causing other menus to freeze too until I have to exit the game. With testingcheats on and moo/debug cheats active it causes the option to buy toys through the pet toy boxes to to freeze the game and the screen greys out. I have to exit to Manage Worlds and return. Tested this with and without and it's only happening with testingcheats on.
It's also freezing CAS. Using cas.fulleditmode stops everything from responding. I click the weight slider and everything freezes. There's no stuck menu for this but everything is unresponsive in the same way. All I can do is restart my console.