Find or make 2 adjacent and level path blocks.
Dig out the one of the path blocks such that the block entity remains in the hole you just dug or just throw in your diamond fortune 3 pickaxe.
Stand back and fill in the hole with a piece of dirt.
Marvel as your items do not rise to the surface (and don't worry about that pickaxe; it is useless anyways).
Dig out the hole again to retrieve items.
Continue enjoying the beta.
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Comments

Thank you for your report!
We're actually already tracking this issue at MCPE-26845, so I will resolve and link this ticket as a duplicate.
If you would like to add a vote and any extra information to the main ticket it would be appreciated.
If you haven't already, you might like to make use of the search feature to see if the issue has already been mentioned.
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