For me it's those times where you have to nuke a chat because you let one small wrong detail slip through and it never goes away because the bot saves deleted or changed messages
>character has a tail
>bot suddenly gives her another one
>delete part of message to fix it
>extra tail returns
>OOC that the second tail does not exist
>bot (fucking deepseek v3) spitefully says in its mesage "her other tail would be wagging in glee, if she had one" like a spiteful little brat
>tail returns in full right after
>put in chat memory that the second tail isn't real and she only has one
>keeps doing it