I looked through mentioned bug reports and i dont think that they describe the same behavior as I observed. Also I edited my findings to make them more comprehensible. Should I split that report in two? (In my mind they are caused by the same problem)
The observer not activating a redstone lamp could be related to MC-197705 although it does not explain the fact that noteblock's instrument is not updated.
I looked through mentioned bug reports and i dont think that they describe the same behavior as I observed.
Also I edited my findings to make them more comprehensible. Should I split that report in two? (In my mind they are caused by the same problem)