[wingnut60]

Cant help with the suspension, but on my track lights--had same problem, several others have had this also--ended up taking suggestion of forum member to take elec conn box off of track end and expose copper tabs where the box connects to track. After several attempts to bend the tabs as was suggested, and not getting it to work, bent them severely and replaced the box. Everything has worked fine now for over 2 years.
When I say bent severely, it was hard to get the box back over the conn tabs--but it has worked ever since. I had tried MANY times to figure this out, even deciding it was never gonna work and bought a new track light. While waiting for the new light to be delivered, decided to bend the tabs to the point I might ruin them--now I have a replacement fixture I have never used.
Joe