when a friend connects to my multiplayer world, our skins are doubled, my skin changes to my friend's

Thank you for your report!
We're actually already tracking this issue under MCPE-48207 so I've requested this report be 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:
📓 Issue Guidelines – 💬 Community Support – 📧 Customer Support – 📖 Game Wiki