If you’re in game, and you try to paste an image into the chat or a text box (Lightshot or something) then it will break the copy-paste function across your entire PC until roblox is closed. This goes for other apps too, like notepad and stuff. Even when you try to copy text again, the text won’t copy properly. Pretty much all clipboard functions are disabled for all programs temporarily.
Wanted to edit this post for anyone who sees this and still experiences the bug. A temporary fix is to copy text from a Roblox text box. A good example is the chat text box (you can select text by clicking and dragging) and then pasting that text in a Roblox text box. After that you can go back to copy-pasting normally as if nothing happened.