On every single one of my custom skins I made when I select for slim arms the left leg of the character is flipped. It has started since the 1.16 update. It's isn't serious, just mildly annoying. As a skin creator, I always love to see my skins in Minecraft. The malfunction just discourages me. That's all.
Thank you for your report!
We're actually already tracking this issue at MCPE-85749, so I will resolve and link this ticket as a duplicate.
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