For some reason, if you open a Barrel when placing a Barrel, the Barrel that opens will appear opened, but no GUI is shown. To my knowledge, this likely is a client issue.
MCPE-100177
Barrel remains open even if GUI is not visible
Resolved
Duplicate
0
Mac Pro G4 Cube
(Unassigned)
Unconfirmed
Windows
Windows 10
1.16.40 Hotfix
Retrieved
Thank you for your report!
We're tracking this issue in * MCPE-71196*, so this ticket is being resolved and linked 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.
Quick Links:
📓 Issue Guidelines – 💬 Community Support – 📧 Mojang Support – ✍️ Feedback and Suggestions – 📖 Game Wiki