While Barrels normally work as Intended, If the player fills a Barrel entirely, with the exception that the Last stack of an item within the barrel, Is not a Full stack, and continues to "Fast store" or Through Mouse and Keyboard Shift Clicks another stack into the Barrel, The game client will Crash. The world will remain fine, The player who added the items into the barrel will only be the one to crash.
This can lead to either the Xbox one console itself Crashing, or lagging to the point the Dashboard cannot be brought up.
Thank you for your report!
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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