Are you powering up the base first?
There can be a delay with the signal getting to the track after the power is already there.
Is the wall plug for the base plugged directly into the wall or a powerstrip?
Some powerstrips have been known to degrade the signal.
One side of the Tmcc/legacy signal is broadcast from the ground wiring in the walls of the room the layout is in via the ground lug on the base wall plug.