Hi i'm playing on a friend server and we don't know why but often one of these thing doesn't work ! When it's redstone we can push button or lever it's like your not op and the redstone don't activate same has piston and putting a torch next to a redstone don't light it.
Some time it's water and lava that stop from moving they just became a bloc even if there is nothing next to them when we use the bucket and sometime it's the flint and steel the fire despawn after spawning.
We only use backpack pluggin and it was already here before.