The observer blocs works very well.
It has an input and an output.
But, if you place a redstone dust next to a side which is no input or output, the redstone will connect to the bloc...
not so horrible, but it could be embarrassing for some redstone builders !
thanks for reading,
hope this was useful
Wulfhartus, the Clumsy Lord
Erik Broes
In MCPE, Observers do not redirect redstone dust visually at all, but server-side they redirect on all sides, as in the Java edition. (See MCPE-15850)
Personally, I think both instances of observers should be changed to function like this: only the output should redirect redstone dust. I doesn't make sense for the observing input side or any other side to redirect redstone dust, but it does make sense for the output to redirect it.