Losing item upon exiting the warzone

[Kenchiiv]

Describe the Bug
A clear and concise description of what the bug is.

A friend of mine has warped into the Warzone trying to catch a legendary pokemon, However upon exiting the Warzone, all of her shulker boxes from her inventory had suddenly disappeared with no apparent reasons. At first, we thought it was just a bug with the visuals, but when she relogged after the incident, her shulker boxes was not there.

To Reproduce
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4. See error

Servers with the Bug
Please provide a list of which servers have this bug.
Server this occured in was Mewtwo
Expected behavior
A clear and concise description of what you expected to happen.
We expect that peapeerat shulker boxes gets returned. she lost 5 out of 6 shulker boxes (which were all in her inventory)
We retrieve the 4 out of 5 contents of the shulker boxes that were lost thru our previous recordings, in hopes to retrieve her lost items. if these boxes were to be retrieved to peapeerat, it would be much appreciated as these bugs are unfair to players. we were not recording during this time of incident so it would understandable some these boxes were not returned, but yet it is unfair that players are punished upon exiting the warzone
Screenshots
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Additional context
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