When a redstone torch was was placed above a redstone dust that lit up and one block above and to the right of a piston the piston does not activate unless a block is placed to update the piston.
MC-141974
Piston not updating
Resolved
Awaiting Response
0
Ace Burton
(Unassigned)
Unconfirmed
Minecraft 19w02a
Retrieved
This has always been the case, no? The piston is BUD powered, which is why it only extends when you update it.