How do I give a physics object velocity on touch end?

I have a player that moves around a circle. When I touch the screen I build up power. On release I give the player a velocity equal to the power and move in the direction of the touch x and y.

On a short touch it's fine, but on a long touch the player receives no velocity at all.

Capx attached (Game layout)

Any ideas?

It looks like it's a problem switching between running around the circle and setting the velocity. If I put a 0.04 second wait between setting landed to 0 and adding the velocity, it seems fine. However, adding a wait feels sloppy and it may break depending on the performance of the device.