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Bug
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Resolution: Works As Intended
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None
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0.14.0 Beta 2, 0.14.0 Beta 3, 0.14.2, 0.14.3, 0.15.0, 0.15.2, 0.15.6, 0.15.90.7, 0.15.9, 0.16.1, 0.16.2
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Confirmed
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Tablet - Android - Samsung Galaxy Tab 4 Nook
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32132
Comparators send their signal too slowly when activated. This causes a problem with unloaders because the powered rail doesn't deactivate in time to stop the minecart chest over the hopper. Usually the minecart bounces off the block and returns back along the track. The hopper is only has time to disgorge one item from the cart per run.
I've tried a couple of designs and both have the same issue.
- is duplicated by
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- Resolved
- relates to
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- Reopened
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- Resolved
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- Resolved
[MCPE-12848] Comparators measuring a container take redstone 2 ticks to change their state instead of 1
Devs reported back that this works as intended.
Explanation:
1 tick for updating the torch.
1 tick for updating the hoppers. (arguably this could take a tick longer)
1 tick for updating the comparator.
This may just be a duplicate of MCPE-15793... it's hard to tell. When 15793 is fixed, we'll know for sure.
We don't know what exactly is incorrect and in what way it is incorrect. PHO, in the last image you posted, you will get another result if you put a repeater between the lever and the rest of the machine. 
(yes, that is another bug which I think is already reported) However, it looks to me that it's the dispenser that's too slow...
The screenshot shown above proves that it's comparators that are doing the wrong thing, not hoppers.
There is a single item in the dropper. Push the button to activate a dropper that is measured by a comparator. The dropper pushes the item into the hopper after 2 ticks (as expected). The comparator deactivates after 2 ticks (unexpectedly) instead of 1 tick.
This bug has been reported to our internal bug tracker for further testing and a fix. It is scheduled to be fixed in one of the future updates (no specific date can be provided).
I am trying to build an item sorting system and the slow reaction of the comparator is causing the items to go past the filter and wind up in the junk chest.
I am using a standard sorting construct with overflow protection. Items come up an item elevator into a hopper line.
Quick list of the possible problems.
Power rails are reativating too quickly.
Items being taken from a minecart/hopper to another hopper are leaving the second hopper too quickly.
https://youtu.be/gr4tlA9-430
https://youtu.be/t-cWqvP8rw0
These two designs no longer work in xb360.
The mine cart drops one item and is sent back down the rail.