Ideas
My ign has been IIIIIIIIIIIII for a 3 years now and I have this bug atm. I changed it to a normal name on steam and you're right none of my teammates game crashed. I use capital i for that name so it might not be just special characters thats bugged
Thanks for confirming — this is really useful data. Your case actually expands the trigger pattern: your name was just repeating capital "I" characters, no actual punctuation or spaces, yet it still triggered the same crash on teammates. So the bug isn't strictly about special characters / punctuation — it likely involves a wider category of strings (possibly repeating characters, or characters visually similar to delimiters like `|`, or some other pattern in the name-parsing logic).
Glad the rename worked for you too. Two independent accounts with very different name structures (mine had `||` + spaces, yours was repeating `I`) both fixed by renaming — that should give engineering a clear enough signal to track this down.