Having visited more than a dozen ocean monuments in my world, it appears every one generated identically. This generation includes a two story tall empty room, and no sponge rooms. Seed is 380666697, world was created shortly after the release of 1.16, monument exploration has been in various subsequent 1.16 releases. Game is being played with local multiplayer on Nintendo Switch.
Some of the identical structures:
X: -8,504 Z: -696
X: -8,088 Z: -280
X: -6,808 Z: -1,256
X: -5,304 Z: -920
Linked issues
Comments 1
Thank you for your report!
We're actually already tracking this or a very similar issue at MCPE-95011, so we will resolve and link 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.
Quick Links:
📓 Issue Guidelines – 💬 Mojang Support – 📧 Suggestions – 📖 Minecraft Wiki