Steps to reproduce the issue:
1. Resizing the window so that the aspect ratio is higher than 21:9 on the horizontal, e.g. 32:9 for super ultrawide monitors.
2. Stand with head in a block, in survival by pushing a piston into you / using setblock ~ ~1 ~ stone
Expected result:
The block texture spanning the full window
Actual result:
You can see the world though the sides
Thank you for your report!
We're tracking this issue in MC-225337, 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:
📓 Bug Tracker Guidelines – 💬 Community Support – 📧 Mojang Support (Technical Issues) – 📧 Microsoft Support (Account Issues)
📓 Project Summary – ✍️ Feedback and Suggestions – 📖 Game Wiki