When I spawned a warden in preview edition using a shrieker, it flashed orange and white. I swear it only happens when it spawns with a shreiker. I am using an HP Integrated Graphics card, an Intel Core i5 vPro, and this was upgraded to Windows 10 from Windows 7.
Thank you for your report!
We're tracking this issue in MCPE-153580, 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
📓 Project Summary – ✍️ Feedback and Suggestions – 📖 Game Wiki