[HayZee518]

The track lighting connectors use either push in terminals or screw connections at the juncture point. The connector slides into the end of the track and then locks with a single screw in the center. Two stabs connect to the wires which are embedded in a plastic channel, one on either side of the track. Single circuit track receptacle devices have stabs that are 180 degrees apart from each other and mate with the track conductors. This is usually a push in and turn one quarter rotation to lock to the track.
Check the connector to see if the track channel widened at some point and there is no connection to the track. You may be able to squish it back together using channel lock pliers covered with tape.
The other is the switch connections as Kactus mentioned.