The image looks like pink and black squares in all blocks
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Have you tried a full reinstall of the game?
Backup any data you don't want to lose, then try the following:
Backup your MinecraftWorlds folder (if you want to save your worlds) (Device storage > games > com.mojang > minecraftWorlds)
Uninstall Minecraft
Delete the com.mojang folder (Device storage > games > com.mojang)
Reinstall Minecraft
Run Minecraft and if it works restore your MinecraftWorlds folder
Sometimes a clean install of the game will help with these kind of issues.
You might find the following links helpful:
Quick Links:
📓 Issue Guidelines – 💬 Mojang Support – 📧 Suggestions – 📖 Minecraft Wiki
Thank you for your report!
We're actually already tracking this issue at MCPE-41495, 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
Does that world have any resource packs or behaviour packs active? If it doesn't, try restarting Minecraft / your device, or see if putting a new resource pack on fixes things.