When I shear the sheep they do not change their appearance, they still appear to be un-sheared. I am able to reproduce using:
World template Neon District RTX with only the world and default resource packs (ray tracing on)
Standard world with vanilla resource pack and ray tracing off
Standard world with the NVIDIA HD foundational resource pack and ray tracing on
Added a screenshot of right after shearing where you can see the wool block dropping and the sheep remains the same.
Thank you for your report!
We're tracking this issue in MCPE-63188, so this ticket is being resolved and linked as a duplicate.
That ticket has already been resolved as Fixed. The fix will arrive in the next version or is already included in the latest development version of the game, you can check the Fix Version/s field in that ticket to learn more.
The RTX beta uses an older version of Minecraft (pre Nether update). The fix will come when the RTX beta updates to the latest version.
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 – 📧 Customer Support – ✍️ Feedback and Suggestions – 📖 Game Wiki