Charging port smells of nail polish

The other day, I got a notification from my phone telling me it was overheating and wouldn’t charge until it was cool. I thought nothing of it, but yesterday my charging port started smelling of nail polish when it was charging. I left it overnight (not charging), but this morning it still smells of the nail polish, but only very faintly. I’m using a different charger now that doesn’t make the phone overheat, but I’m worried about my battery. Is this normal?

The phone is an iPhone 13 and it’s just over a year old.