The chatbox and the mouse?

[Vertigineux-thrall (Vertigineux)]

New chat behaviour

You’re free to turn this into an addon with https://addon.bool.no/ and/or upload to CurseForge UIParent:UnregisterEvent("GLOBAL_MOUSE_DOWN") It might not be a proper fix since it also does some other stuff with dropdowns but oh well https://www.mmo-champion.com/threads/2532018-Chat-input-box-not-staying-active

This changed it back! Give this a try. I’m so relieved.