If a finger collider is placed on a bone with a 0 0 0 local position (meaning its world position matches that of the parent), it no longer works in game at all.
This is a regression compared to live, where the finger contact is generated as a sphere at the given location. Moving the child transform even the slightest amount (0.001) resolves the issue.
This is a large breakage, as VRCF global colliders default to 0 height (sphere) by default, and this issue breaks all existing uploaded avatars using that feature.