Any time someone changes their skin it also changes other player skins.
On Realms and Servers for Windows 10 Bedrock, I've had my skins that I import randomly get swapped with other peoples' skins.
Linked issues
Comments 3
Re-opening and moving to bedrock game as dupe REALMS-2685 mentions servers as well.
Thank you for your report!
We're actually already tracking this issue under MCPE-48207.
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Is this specific to Realms or happens in a local LAN world as well?