For exemple, observer blocks cannot power comparators and redstone torches.
Applies to:
Comparator
Redstone Torch
Hopper
Redstone Lamp (this one cannot be set off with a one tick gap)
The weird thing about this is that it doesn't affects some other 'redstone' stuff that are not such complicated as these, like doors, trapdoors and more.
Linked issues
is duplicated by 14
MC-109807
Torch Redstone and comparator not receive redstone signal observer
Resolved
MC-266666
Comparator not working on short pulse
Resolved
MC-108331
Comparators do not react properly to 1-tick pulses.
Resolved
MC-110548
Observer<->Observer clock produces inconsistent behaviour in powered items.
Resolved
MC-112795
Comparators not reacting to 1-tick clocks via repeater
Resolved
9 more links
relates to 4
MC-230883
1 redstone-tick pulses only deactivate comparators when locking a repeater
Resolved
MC-2340
Redstone torches schedule updates when they should not, causing unreliable timings.
Resolved
MC-75403
Repeaters accept shorter inputs than comparators
Resolved
MC-109574
Redstone torches can't get unlit by observers
Resolved
Attachments
Comments 5
Confirmed in 1.11.2. It may be WAI since torches also aren't powered by observers. However repeaters are, so it's hard to say.
Observer blocks create 2 tick (gameticks) pulses now. Comparators aren't powered by 2 tick pulses in general, ergo this is not a bug.