Basically ShareX is a program that's really useful for taking screenshots and uploading it in a second. If I use the "region capture" feature which only lets me screenshot a specific region of the screen (CTLR + PrntScrn ) it completely bugs out the chat box in a way that the backspace button can no longer be used, the a button deletes the entire chat input and pressing just "v" pastes whatever you have on your clipboard.

I tested the same buttons without ShareX and the chatbox did not bug it out so I'm pretty positive that the program is somehow interfeering with the game, I might be wrong though.