Interesting Goof by the PU

[Peruvian]

Much like a foul ball (unless it is a questionable home run) can not be changed; this would be difficult.

However, whereas the defense should know an infield fly rule is in effect and the onus is on them to know the difference, I would say the defense should have known the rule here, regardless of what the umpire said.

Seems to me he's just going to have to eat it.