It happens at the beginning of every month, give it a day or two. Also new vote sites have been added so that might be causing additional problems.
This doesn't have anything to do with that as it's contained within one chunk.
Redstone doesn't work like it's supposed to. None of the BUD and most observers don't detect anything, tripwire hooks work only 1 out of 5 times,...
Your sheep disappear because the mob/entity cap is low. If you want more spread them out over multiple chunks. If I remember correctly I have 5...
Separate names with a comma.
