I don't know if this happens to you or not, but a great number of times and regardless of which break I am in this happens.
I paddle out, and there coms a wave, and I catch it and that's the best ride for the whole session. It is never repeated again for the whole session. Another thing of this is that it is also usually rather nice ride.
Yesterday, I tried to figure this out, and so I actually got out of the water in a middle of a session, and then try to paddle out again. But the result is the same, no same good wave comes.
If this happens to you too, why not write a comment. I want to know.