Since seems to be iffy and possibly better after warming up, maybe just a drop of light oil on the shaft of the spinner kicker and all the pivots in that unit, and then work them manually to see if it loosens up.

Also there is a capacitor delay circuit for the spinner that allows the spinner lights to keep advancing for a while until the spinner slows down enough and then it lets it complete the spin sequence. If that circuit has a problem it could also cause very abbreviated spins.