Hi.
You can open the action script by right-clicking the action and select edit script.
in the action you will see this part :
public override void OnFixedUpdate()
{
DoSetVelocity();
if (!everyFrame)
Finish();
}
Which means that it runs on fixed update
So there must be some other issues.
I check on the unity forums and actually many people have issues with that
I did a bit of testing and when i use an 'add force' and force Mode set to 'impulse'
it seems to be consistence.
Maybe you can show your setup?