Animation only playing once

I have a 6 frame animation, that gets triggered when I tap another object, animation runs once after the tap.  This works fine, until I add another object "C" that has an animation-linear to itself.  As long as that object "C" is moving, the 6 frame animation only plays once after a tap initiation.  If I tap again the 6 frame animation does not play.  If I turn off the "linear" on object "C" the 6 frame animation works every time I tap.

I can't work out why or how to alter this?