MCPE-17274Repeaters add random delay to pistons (but not to other components)
The double piston extenders below will work occasionally, even though there is not enough delay.
This seems entirely random.
Linked Issues
Created Issue:
Repeater delay issue (possibly a piston issue) (not affected by multiplayer)
The double piston extenders below will work occasionally, even though there is not enough delay.
This seems entirely random.
Attachments4
Changed Summary:
Repeaterdelay issue (possibly a piston issue) (not affected by multiplayer)Repeaters add random delay to pistons (but not to other components)
Added Affects Versions: 0.15.9
Added Linked Issues:
relates to
Added Attachments:
Added Linked Issues:
relates to
Added Labels: redstone-timing
Added Affects Versions: 0.16.1
Added Linked Issues:
relates to
Added Linked Issues:
duplicates
Removed Linked Issues:
relates to
OH WHAT THE
...so this is very similar to MCPE-17208 / MCPE-17274...
Re-opening, as this was incorrectly closed as a dupe of MCPE-13983, which was a separate bug which has now been fixed. I have copied over the information provided by [Mojang] Tomas Alaeus relating to this bug and added it to the description. Also revised the report title and attached the relevant screenshots from MCPE-17208 & MCPE-17274.
I've seen similar issues in 0.15.9. Pistons and repeaters now interact very weirdly with regard to the ticking order, I mean, pistons that are supposed to be ticked have a chance of being skipped or prematurely extended/retracted when they are powered by a repeater. I guess they changed the ticking system to fix
MCPE-15607but the result is unfortunately even more buggy than before... ;(The randomness isn't a bug in itself. If two pistons are activated during the same tick, then it is completely random which one will actually be activated first. You need to make sure one of them are activated a whole tick before the others for it to be non-random.
On the other hand, the repeaters seem to be buggy.
This bug has been in the game since pistons were added, probably sooner. Yes the randomness is not a bug, but the fact that the dpe in images 3-4 work at all is.
@tomas: Yeah I knew that ticking order was intentionally randomized. What I found was, however, inserting repeaters to create a delay sometimes didn't do the trick. Even a repeater set to 4 ticks had a random chance to add no delay to pistons as you said. Repeaters behave completely normally to any other mechanical components.
And in some cases repeaters can add too long delay to pistons, e.g. a repeater set to 2 ticks sometimes add 3 or 4 ticks to pistons.
Tavish McEwen: Are you saying that DPE should work as long as there are 2 ticks and 0 ticks delays respectively but currently doesn't? If so that's
MCPE-15607, not this one.This very bug has been introduced very recently to 0.15.9 and 0.15.90.7. Contraptions that were working flawlessly in 0.15.8 now occasionally malfunction.
I meant that this dpe should never work
The screenshot shown below is a circuit to move an extended piston back and forth. It was perfectly working until I updated the game to 0.15.9. Its expected behavior when you turn the lever off is as follows:
MCPE-15607.However in 0.15.9, there is a small chance that the piston C leaves B behind, which is completely unexplainable. It is as if the repeater were only making 3 ticks delay even though it is set to 4 ticks. Adding one more repeater to piston C works around the problem but it shouldn't be needed at all.
May be the fact that pistons unpowering other pistons is not instant in PE, maybe this was improved/worsened in 0.15.9
I think this may be related to, or even the same bug as,
MCPE-17208.redstone dust has 1 tick delay. tested this side by side with a repeater and a comparator and they activate piston at the same time. tested it on 0.15.10
To explain what's going on:
If you activate a repeater with an in-world change (pulling a lever, pushing a button, placing a redstone block, a piston pushed/pulls something which causes the redstone system to change) then the repeater will activate with 1 tick less delay than it should. A 1 tick delay repeater would activate immediately just as if it was redstone dust.
Resolving as duplicate of MCPE-15793.