This sounds like an issue I've started to experience on iOS Minecraft v1.2.16.
If there is any block in the right hand, this block will be placed instead of the crafting UI appearing. Also happens with chests.
This sounds like an issue I've started to experience on iOS Minecraft v1.2.16.
If there is any block in the right hand, this block will be placed instead of the crafting UI appearing. Also happens with chests.