When using Wedi Board with Swanstone Pan, does it get installed like the Swanstone instructions for their alcove walls?

They say the backer water proof walls should be flush with the Swantone shower pan lip and also with a 1/2 inch gap above the lip (to avoid wicking).

Seems like their approach would let water get into the 1/2 inch gap over time. But then, I have no experience with this wicking concern.

What do you folks think about this?