Whenever me and anyone else play together, if anyone has a classic custom skin, everyone playing will either have the same skin, or everyone will have someone else's. The only way to combat it is to have only one person with a classic custom skin and everone else have the new customizable ones. I do play on a galaxy S9, but it does appear on other devices from Nintendo Switch to kindle fires.
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Thank you for your report!
However, this issue is a Duplicate of MCPE-48207.
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