Forming a ring of Observerblocks with some corners missing causes the Observer blocks to give out a constant signal.
To reproduce simply copy what you see on the picture. (Might need a single update)
MC-107500
Minecraft Observer Block does not update itself correctly
Resolved
Works As Intended
2
Thomas Bellebaum
(Unassigned)
Unconfirmed
observer
Minecraft 16w39a
Retrieved
Intended. When one receives an update, it powers the block behind, which updates the next one and so on.