I was unhappy with the new observer block timing because the current output doesn't allow you to make a redstone torch pulsate, so I tried using a repeater to delay the signal.
It worked, but also spams the console with: "lskdjfldskjf".
To reproduce (also see the attached screenshot):
Place an observer block, place a repeater behind it and set it to 2 ticks.
Trigger the observer block.
Watch the console output.
Pictures show the circuit I used as well as my console output.
The title change by @unknown was correct, this isn't dependant on the observer. This is triggered by inverting a redstone torch.