So, this is how Minecraft Bedrock works when playing offline, the player's skin disappears even though it was installed in the previous version, but it didn't disappear. Many players' skins disappeared when they updated to 1.21.30.1. And when playing online the skin appears after that exiting the game play it disappears again even though it also happens when playing offline please fix this bug
We're tracking this issue at MCPE-233175, so I will resolve and link this report as a duplicate.
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