Sometimes, (often recently after the update) my realm will disconnect all players at the same time and reset progress 5-20 minutes back. Occasionally chests bug out and crash the game once opened. In addition, if standing on a shulker box when it's opened it can crash the game as well.
Thank you for your report!
However, this issue is Invalid.
Crashes such as these are logged automatically, this will therefore be investigated further by the development team internally. The issue with the server reverting to the last save is tracked as MCPE-12347. The issue with crashing when opening a partially invisible chest is tracked as MCPE-106030.
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