portals can spawn on shulker boxes (and probably other containers) causing them to delete and delete things in them
Linked issues
Attachments
Comments
I have programmer art and my own texture pack on and I'm playin on latest release
Hi there!
I can confirm.
Can confirm too, very weird.
Confirmed for release 1.16.3.

Affects 1.21.3. Looking to request ownership to add steps to reproduce and also maintain the report.
Thank you for your report!
We're resolving and linking this ticket forward as a duplicate of MC-273945, as that ticket contains more detailed information and/or has already been triaged by Mojang.
If you would like to add a vote and any extra information to the main ticket it would be appreciated.
Quick Links:
📓 Bug Tracker Guidelines – 💬 Community Support – 📧 Mojang Support (Technical Issues) – 📧 Microsoft Support (Account Issues)
📓 Project Summary – ✍️ Feedback and Suggestions – 📖 Game Wiki
Hmmm, Do you have programmer art on or you are playing an outdated Minecraft version, because if you are playing on a outdated version of Minecraft, well then this issue is invalid.