The popcorn probably was cold by the time it your other pot
also the oil probably dried before 24 hours
& why wouldn’t the oil be genuinely fleishig?
I’d assume wipe off the spot (not that there is one- but it’ll make you feel better) and your good to go
(besides even if it is fleishig- it would be eino ben yomo so the nat bar nat in it wont be a problem)