While interacting with a friend, an older avatar of theirs exhibited strange behaviour for only some of us in the instance whereas others didn't see anything strange about their avatar. This is I believe may have been due to myself and some others running the beta while others were on the current stable build. Their avatar's ear bones stretched extremely tall as seen in the attached screenshot. Reporting this on their behalf, they sent me their avatar ID which is: avtr_63f51d38-4524-486c-8b0d-d2261e0f6930