When using Dextro's avatar protection system, the avatar performance calculation entirely fails in the new Open Beta menu.
This is not the case with the old menu, and with the quick menu, as others are able to look at my avatar's performance details.
Dextro says that this is most likely because no meshes are visible when an avatar gets loaded, and there are no animations enabled either.
The side effects:
If you have not selected an avatar where performance calculation works correctly, looking at the avatar details, all you see is N/A at all avatar stats, as seen on the screenshot I attached.
If you have selected an avatar, where the performance calculation was successful, and then select an avatar where it fails, then the newly selected avatar will show the performance details of the previous avatar.