About dropper lines not working as they should, the ticks are varying depending on the position in the game chunks and the simultaneous activation of other redstone components, causing the non-functioning and order switching, breaking item lifts, transport fast and other machines that need the dropper order to work consistently.
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For replicate: method 1
1. Make a line of 3 droppers vertically
2. Place a block in front of the first dropper, put redstone dust on top of the block
3. Put item in the first dropper of the line
4. Energise the redstone dust
*Observation:*Works normally, the item will pass through the 3 droppers and will come out ✔
5. Now place a "redstone clock", using 2 observers facing each other, anywhere in the same chunk as the droppers
Expected result: the item will pass through the 3 droppers and will come out.
Result: the item get stuck and not leave the dropper ❌
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Another easy way to replicate
1. Do steps 1 to 3 (method 1)
2. Place an observer facing the restone or the droppers in the same chunk
3. Energize redstone dust
Expected result: the item will pass through the 3 droppers and will come out. ✔
Result: the item get stuck and not leave the dropper ❌
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Another way to replicate
1. Do steps 1 to 3 (method 1)
2. duplicate the same system, or connect redstone dust to other droppers in the same chunk
3. energize the two together
Expected result: the item will pass through the 3 droppers and will come out. ✔
Result: the item get stuck and not leave the dropper ❌
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Very important!
Don't forget that the bug works only in the same chunk, so follow the steps and reproduce in the same chunk, otherwise it will work as expected.
Linked issues
is duplicated by 1
Attachments
Comments 4
please fix it, this bug gave me a lot of headache, I can't build my machines because of these conflicts, even if I work around using activation outside the chunk, the machines break after restarting the game
The player as same problem: MCPE-116576
I think this is actually a closer match to MCPE-16208, but MCPE-116576 and MCPE-157060 describe specific manifestations of the same underlying issue, namely: dropper update order is neither fully random nor fully deterministic. As a result, builds that work when built once may not work when rebuilt in a different place or when other redstone components or blocks that use pending ticks are placed or removed in the same chunk.
Things that affect how the dropeer works: button, observer. other dropeers