When you shift click an item into an almost full barrel (Screenshot for what i mean. im bad at explaining this) it will crash the game.
its hard to explain so im going to speak about whats happening in the screenshot. i have almost a full barrel of diamonds but one of the slots have one diamond compared to the other slots which have a stack. i have another stack in my hotbar and if i was to shift click it in my game would crash.
I tested it with a single and double chest so my conclusion is that its a barrel issue
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We're actually already tracking this issue at MCPE-45833, so we will resolve and link this ticket as a duplicate.
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