[MCPE-17464] Extended pistons retract for a second when the world is loaded. Created: 13/Oct/16  Updated: 18/Sep/18  Resolved: 18/Sep/18

Status: Resolved
Project: Minecraft (Bedrock codebase)
Component/s: None
Affects Version/s: 0.15.10, 0.16.0, 0.16.2, 1.0.0.1, 1.0.3, 1.0.4.0, 1.0.4.1, 1.0.4.11, 1.0.5.13, 1.0.6.0, 1.0.5.54, 1.1.0.0, 1.0.6.52, 1.1.0.4, 1.0.7.0, 1.1.0.9, 1.1.3.52, 1.1.4.51
Fix Version/s: 1.1.1.51

Type: Bug
Reporter: billy
Resolution: Cannot Reproduce Votes: 11
Labels: piston, redstone, world-loading

Attachments: File Forgetful Pistons.mcworld     JPEG File forgetful-pistons.jpg    
Issue Links:
Duplicate
is duplicated by MCPE-19086 Pistons forget their extended state o... Resolved
is duplicated by MCPE-19398 Pistons change statement when launch ... Resolved
is duplicated by MCPE-19647 Crops break while moving away Resolved
is duplicated by MCPE-19649 Pistons reactivating Resolved
is duplicated by MCPE-20376 Pistons are "de-activated" on join/re... Resolved
is duplicated by MCPE-21196 Saving/Loading the world causes bug w... Resolved
is duplicated by MCPE-21882 Piston Keeps Turning Off Each Time I ... Resolved
Relates
relates to MCPE-13608 Redstone components update when world... Resolved
relates to MCPE-19138 Pistons stuck- sometimes don't overwr... Resolved
relates to MCPE-21761 redsone torches do not prevent/lock h... Resolved
Confirmation Status: Confirmed
Platform: Windows
CHK:
ADO: 52615

 Description   

From MCPE-19086:
The extended state of pistons is not saved in the file, instead their state is recovered on the chunk load by ticking them with some delay.

In the screenshot shown above, the sticky piston is permanently powered and thus should never retract. But if you reload the world the piston momentarily retracts and triggers the dispenser containing a water bucket.

Original description:
When loading the world extended pistons that aren't in the same chunks has the player will retract for a second. It seems to effect 3 to 4 chunks away from the player.



 Comments   
Comment by [Mojang] Mega_Spud (Jay Wells) [ 18/Sep/18 ]

Cleaning up old tickets: This ticket has not been updated recently (1 year+) so is being closed as Cannot Reproduce. If you feel this is still a valid issue then please comment, or create a new ticket following the Issue Guidelines.

Quick Links:
📓 Issue Guidelines – 💬 Community Support – 📧 Feedback – 📖 Game Wiki

Comment by jigar frobozz [ 20/Jul/17 ]

Still happening, 1.1.4

Comment by Charles Agostini [ 21/Jun/17 ]

1.1.1 affected win10 and honor 8

Comment by Specialistol [ 08/Jun/17 ]

This got much worse for me in 1.1 update (win-10 PC). Previously I'd have the pistons retract maybe once in every 10 world loads. Now, it happens every single time.

Comment by Joseph Mazelin [ 27/Apr/17 ]

Confirmed. 1.1.0.8 affected

Comment by Charles Agostini [ 14/Apr/17 ]

1.0.5 affected

Comment by Charles Agostini [ 05/Apr/17 ]

True in 1.0.4

Comment by Zeb [ 09/Dec/16 ]

Reopening... I have found out that this is in fact a separate issue from MCPE-13608.

Attached screenshot & test world from MCPE-19086.

Comment by Zeb [ 27/Oct/16 ]

After further testing, I have concluded that this bug is the same as MCPE-17464, where redstone components update upon world-reload. Some contraptions with pistons may update during world load and cause pistons to be momentarily unpowered, resulting in this problem. Closing this ticket as a duplicate.

Comment by Zeb [ 21/Oct/16 ]

Confirmed to occur in 0.16.0. (Tested on Windows 10.) I was loading my redstone testing world and could hear some pistons retract as the world loaded. It happens every time I load the world. Not sure if it happens to all pistons or not. Will need to do more testing...

Comment by Zeb [ 16/Oct/16 ]

Could you provide screenshots of the pistons that you have seen retract upon world load? It's hard to tell what is going on if we don't know what is powering the pistons. A world download would also be helpful.

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