Minecraft crashes after typing something in the chat and pressed Enter

Put the summary of the bug you're having here

What I expected to happen was...:
I expected that the message will be send

What actually happened was...:
I typed in my message and pressed Enter after I pressed it the game crashes instantly, thats happening everytime i want to write and send somthing. I think its only on my PC but I dont know why.

Steps to Reproduce:
1. Type in some words
2. Press Enter and it crashes