I found a public fallback avatar with an unusual fallback avatar performance ranking (Good/Medium), while the "Use as Fallback" button also (incorrectly?) appears for this avatar while that avatar isn't mine.

Affected avatar: Ooka （Quest Compartable） () by Diṧconnect

Steps to reproduce: Visit the above avatar hyperlink on the VRChat Home website, find the "Use as Fallback" button and click it. I don't know for sure how the avatar became eligible as a fallback over years of changes (since 2024).

Expected result: Don't show me "Use as Fallback" if it's not my avatar or an official fallback avatar. This also shouldn't be a valid fallback avatar, because it's not Good rated on all "supported" platforms (Windows/Android).

Actual result: "Use as Fallback" is visible, although not functional. ("This avatar isn't yours or an official fallback avatar․") The button is shown for a custom fallback avatar with an ineligible performance ranking.

Additional info: I'm ignoring the lack of iOS avatar here as a "supported" platform, because custom fallback avatars only require Windows/Android support anyway.

The likely result of actually using this avatar as a custom fallback avatar would likely result in a performance blocked robot when possible, anyway.