Like I said, we all have a different idea of problematic. I would consider a guest who peed the bed, if they didn’t bother mentioning it, and ask how I would like them to deal with it, to be problematic.
As opposed to the really nice guest I had, who had an unexpected attack of Montezuma’s revenge before she got out of bed and could run to the toilet, and got a bit of feces on the sheets. Although she was mortified, she right away told me, said she didn’t want me to have to touch them and could I please show her how to work the washing machine.
And a guest who brought a pet who peed inside I would also consider problematic.