I've noticed it as well. Both times I've seen it come on it has got stuck on it and then not done any of the other announcements or displayed any other messages on the screen. I agree it's not very accurate either. I was on a train which hit a tree last week and shortly after coming to a half it informed us we were running 11 minutes late, then about 5 minutes later, still sat in the same place, it informed us we were now 6 minutes late. By the time we got moving again it had decided we were 16 minutes late; not the 45 minutes we actually were.
All of which contributes to the 'let's make ourselves look like incompetent idiots' own goals which
FGW▸ seem to be scoring all too often recently!