undocumented limit of what can go into an issue comment field?

I have two issues in my private repo that I can't delete/resolve as they throw 500s on load. My guess is it has to do with me copy/pasting a stack trace into the comment field of the issue.

Really my immediate concern is getting the two issues closed out and I'll make a note that for the time being stack traces shouldn't be copied into bit bucket comments. Attached is the stack trace I attempted to put in the comments field.

Let me know what you else you would need from me.

Thanks!