The cape appears on the front of the player instead of on the back, so It looks like a bib. Running and falling cause the cape to move up, as it normally would, but still in the front of the character. I have played online with multiple people, and none of them have said anything about it, so I assume that it is just a visual error on my end and doesn't affect theirs.
Thank you for your report!
We're actually already tracking this issue at MCPE-54629, so I resolved and linked this ticket 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.
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