Weird behavior after copying in emacs

I'm not completely sure if i should put this here, but recently I tried to copy a considerable amount of text in Emacs, but instead of putting it in the system clipboard like it has done in the past, my phone buzzed and half of my screen got filled with gibberish. After some trial and error it appears so that only a certain amount of text can be copied. (About 392 lines of bash history). If there's a limit to pronote the API package I would understand, but that's guesswork. Any idea how I could get copy/paste working in Emacs for long texts?