When facing a chest with at least 1 item in every slot, observers randomly trigger when brought into rendering distance.
See attached pictures for a simple testing setup to demonstrate the bug.
To replicate:
Place a chest or shulker box.
place at least 1 item (any item, doesn't matter) in each slot of the box
Place observer facing the box.
Place a command block on the output of the observer
add any simple command to the command block to notify you when triggered
Fly out of render distance
fly back to the test rig
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Does this still happen in 1.14? Probably related to or same cause as MCPE-29548.

I don't think your issue is going to be fixed or is fixed already as 1.14.30 hotfix is released and you're still paying on 1.13

Thank you for your report!
We're actually already tracking this issue at MCPE-29548, so I resolved and linked 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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