Stacks do not automatically top up to 64 when filling chests and moving inventory. Instead, if the total is greater than 64 the two stacks will swap places. If the number is less than 64 they will combine correctly.
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Michael Gill: I complained about the stacking/combining issue in MCPE-32347, would help if you add a vote and comment to it, it currently has no votes/followers.
Re this bug: agree. Replacing 'topping up' of stacks with auto swapping was a mistake. They could have made much better use of double click then for topping up stacks, which is confusing and inconsistent as is.
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Moonshine77: watched and voted. Thanks for the info.
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This has been an issue for a while... Place the blocks down and break them again. It's one of the two piles that are glitched out.
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Recently installed 1.2.15 iOS.. Removing the ability to split stacks by dragging (you now have the little green bar!) and the bug (because putting in auto swap under certain circumstances must be a serious design flaw) that does not allow a double tap to simply stack to 64 is a serious mistake. I have also noticed that some items e.g. Ladders, will not stack to 64 even if the total is less than 64. It is as though it sees the different stacks of ladders as two separate items. You have to throw one stack and take them up again in order to have all ladders in one stack. Besides all the glitches i.e. bugs, the new 'flow' graphics on moving items and opening and closing chests and crafting table/furnaces etc. makes me feel nauseous - and I am not joking. So - no longer classic UI...
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Unless I’m seeing something wrong, 1.2.15 fixed the UI issues for me. I can combine stacks to 64 manually or double tap to get a full stack. It takes from the nearest slot regardless of if it’s in your inventory or a chest.
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Absolutely not fixed for me. Double tapping does nothing for some items - cactus, melon etc etc... others it works. I have to drop the items and pick up again to stack in one slot. This is a duplicate of MCPE-32347?
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I'm having a similar issue, a stack of 10 torches won't combine with another stack of 12.
I know you can fix it by taking it out of your inventory and recollecting it but that's incredibly tedious and not fun at all.
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Mojang can't keep their story straight. First Ana says this wasn't on big list. Mega Spud said it is. All I want is this horrible bug fixed and maybe some honesty from mojang staff in the process?
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I reported this a while back and it got added to this as a duplicate. Classic and pocket UI act the same now, just look different. Also the combining of stacks doesn’t always work.
[Mojang] Mega_Spud (Jay)
For the related issue with items not being able to stack together (rather than this UI bug, please see ticket MCPE-32347)
To give feedback on the UI in general, please visit https://feedback.minecraft.net.
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Also, some identical items won’t combine at all.