In the beta version listed above the inventory sprites are black and white inlcuding dropped items.
MCPE-146362
Beta Item Sprite Issues
Resolved
Duplicate
0
(Unassigned)
Unconfirmed
Multiple
Acer Windows 10 2018 model
1.18.0.22 Beta
Retrieved
Thank you for your report!
We're tracking this issue in MCPE-145560, 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 – 📧 Mojang Support
📓 Project Summary – ✍️ Feedback and Suggestions – 📖 Game Wiki