I've got a seriously weird bug on my account ( and ONLY my account ). How do I fix this?

So only for my account, and I've tested this on multiple accounts and the issue didn't show up, there's this one friend I have. Whenever they go offline, it turns them on dnd mode and sets a status they had from last moth which is seriously confusing me haha- On my other friend's accs and also my spare this hasn't happened at all? I tried to fix it by uninstalling the app on both my phone and computer, also logging off and ond, nothing ever works whh..