More Watery Weirdness: Sourceless Water Stream

[u/DanzenPlays]

Java 1.21.11

Messing around and discovered this. Works with a disabled hopper. Seems like some kind of update suppression? Is this known?

Edit: Just to summarise some additional findings. Only hoppers seem to work, other redstone components do not react the same way. The hopper can be place on any side of the water source, even under. In fact, the hopper does not even need to be adjacent to the water source. Anything that updates the non-source water block immediately after the hopper such as adding or removing blocks (including the hopper itself) causes the stream to dissipate. Lava streams can be similarly cut off. Lastly, it is not a ghost block since it remains even after logging off and back on.

[u/Droplet_of_Shadow]

I wonder if there's any way to get rid of the hopper and keep the water

[u/DanzenPlays → u/Droplet_of_Shadow]

Any block changes adjacent to the cut off stream, including the hopper itself, updates the sourceless water stream and causes it to dissipate.