Hi,
I've been experiencing multiple cases of my upgrading buildings going through timewarps(?) and I've asked other players and they've experienced this also.
Eg. I'm upgrading my gold mine which takes 15h at 8.45am and at 5.30pm it still has 11h+ remaining.
Especially for buildings like the town hall where it takes days already and having them loop back another day, it's really annoying.
Thanks for your help.