Could you give the seed of the world you generated, and the coordinates of these flowers? That way it'll be reproducable
Nobody has painted any sheep yellow or red, first they were colored normally, but after closing and restarting the server they suddenly had these colours.
None, it's completely vanilla
I don't think that'll help, because it happened on a remote server, it's not clientside. I've added it anyway however
Wouldn't it make sense if a weak signal gets in that normally doesn't power redstone, the output must be a weak signal too? The comparator should output the same strength as the input
That block is added in the latest snapshot, even if it didn't exist, the give command should prevent it from crashing the game.