Yesterday 5 minutes after start of conquest I did donate resources. Today I logged on when exactly one day of conquest has passed. I was online and checked my donation counters. Stone donation needed 2 minutes and 45 seconds. Did some chat with alliance and checked the timer again.
Not a single second expired since I checked last time, so I verified the other conquest buildings. I came to the conclusion that the timers of other personal conquest buildings also did nothing. I should already be able to donate, but nope, the timers were frozen.
I had to log off and reconnect to be able to donate resources. Is this a known bug?