I am building a hidden stair case and when attempting to use the observer to power my t-flip flop i realized the pulse dose not effect the t-flip flop.
After some testing I realized that its pulse doesn't power any block next to it yet when 2 dust away it will.
The first and second picture show how it doesn't power any type of block, lamp piston and my own problem, the dropper, it doesn't work. The third demonstrates how it dose power the farther piston yet not the close one. This i assume would work with any other block that can be powered (dropper, lamp, etc)
How to create (its a 1 wide bug so pictures should be better at explaining it)
1: place a redstone dust
2: place an observer so it can power the redstone dust
3: place a lever (or any block that can easily toggle the observer) on top of the observer
4: place a piston connected to the redstone (horizontal to the observer)
5: place another redstone dust so the first one points to the first piston
6: place another piston at the end of the second redstone dust
Edit by @unknown: Note that pistons are exempt from this bug since they redirect redstone dust.
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This is very similar to, but not exactly the same as, MCPE-11871.

This is very similar to, but not exactly the same as, MCPE-11871.

This is very similar to, but not exactly the same as, MCPE-11871.

This is very similar to, but not exactly the same as, MCPE-11871.

Woah now that i see the bug in 11871 it seems like its the exact same bug. If thats the case this isnt a problem with Observers more so its a problem with all redstone.

But there is a subtle difference between this and MCPE-11871, because in the observer case it's the observer that acts as a power source while in MCPE-11871 those opaque blocks aren't themselves power sources but they are merely strongly-powered. So I don't want to close this one as a duplicate.

But there is a subtle difference between this and MCPE-11871, because in the observer case it's the observer that acts as a power source while in MCPE-11871 those opaque blocks aren't themselves power sources but they are merely strongly-powered. So I don't want to close this one as a duplicate.

But there is a subtle difference between this and MCPE-11871, because in the observer case it's the observer that acts as a power source while in MCPE-11871 those opaque blocks aren't themselves power sources but they are merely strongly-powered. So I don't want to close this one as a duplicate.

But there is a subtle difference between this and MCPE-11871, because in the observer case it's the observer that acts as a power source while in MCPE-11871 those opaque blocks aren't themselves power sources but they are merely strongly-powered. So I don't want to close this one as a duplicate.

Confirmed for 0.15.6. (Tested on Windows 10.)
Probably due to the change to pistons to make them redirect redstone dust, this bug is no longer reproducible with pistons. However, it still occurs for redstone lamps, dipsensers, & droppers. (See attached screenshot.)

Confirmed for 0.15.7. (Tested on Windows 10.)

Confirmed for 0.15.90.2. (Tested on Pocket Edition.)

Affects 0.16.0 Beta Build 4 (AKA 0.15.90.7).

Affects 0.15.9. (Tested on Windows 10.)

Affects 0.15.10. (Tested on Windows 10.)

Affects 0.15.90.8 (0.16.0 beta build 5).

Revised title to be more descriptive.

Appears to be fixed as of Beta 1.2.5 Build 2

Appears to be fixed as of Beta 1.2.5 Build 2

Appears to be fixed as of Beta 1.2.5 Build 2

Appears to be fixed as of Beta 1.2.5 Build 2