If the Contact Receiver's Receiver Type is Constant, it may not function properly while sitting in the VRC_Station.
Specifically, if an object with a Contact component whose Receiver Type is Constant is Enable at the time of avatar upload, it will function properly, but if it is Disable at upload and Enable with animation after the avatar is loaded, it will only be True at the moment of contact while sitting in the VRC_Station and immediately return to False.
(It behaves like the Trigger parameter.)
Normally, this requires the Bool parameter to remain True for the duration of the contact.