Fascinating. I have a prompt running on GPT4 turbo that takes an input text and outputs a report in a tabular format that includes some summary and analysis, and on about 1 in 50 runs, after the table headers it'll output a few hundred newlines and then spit out some Korean or Thai text, which, if I put it in Google translate can be pretty weird (i.e. it has nothing to do with the input text).
This reminds me of that.