In terms of the missing Garmin jersey, I could be wrong but here is my hunch… the Garmin jersey for this event is the same jersey unlocked when linking Zwift to a Garmin account. When the Garmin account is unlinked, the jersey also disappears. My hunch is after the jersey is unlocked for this event, the next time Zwift is launched it notices there is no Garmin account linked and removes the jersey from the garage. The only workaround I’m aware of to get this kit is to link Zwift to a Garmin account.
Another thread on this issue…