I had the same exact thing happen to me a few weeks ago but it was not at Wrigley Field though. I forget which stadium it was but I think it may have been Citizens Bank Park left field foul pole. Like you it must have been fear by 8 or 10 feet and it was called a foul ball and no replay or challenge at all. So this is a random bug most likely for all stadiums!
I was so pissed when this happened and it cost me 3 runs and I lost the game because of this major idiotic blown call by the the CPU AI umpires!
Like I said before the CPU AI decision making in MLB The Show 17 and all earlier versions of the game in all areas needs a major overhaul. I am talking about Batting,Pitching,Fielding,Manager moves and the dumb umpires!!!
I hope this will be fixed for 18!