As said by 06:49 PM KolbeSCEA in a PM to me
"Basically, when you enter replay, we no longer have the stats or mug for the player that WAS batting. We also dont have a system in place to stream it in when you enter replay and then re-stream the data for the current player batting when you leave replay. So if we had the jumbotrons turned on, you'd have a mug and data for the next batter (or who was currently at bat if you were in replay vault)
The reason it works in auto replay is that we have not yet cleared that data out to stream in the next batter - so we can show it. The reason it worked last year is that we had player mugs resident in memory at all times."
Who knows maybe next year they will get it working the way we all would like!