IWP Portal Gotcha

Beware filtered portals in IWP.

I have a portal which filters on a global Name field. Since the screen won't update automatically in IWP, you use it by typing a name in the global field, then clicking an "Update" button which does a Refresh step. The portal then has "click me" buttons, which jump to a particular portal row's record in Form view.

Works great, except...for this: If the user types new text in the filter field, and does NOT click the Update button, and then clicks on one of the portal rows, you end up going to the wrong record! The reason is obvious once you think about it -- FileMaker re-evaluates the portal based on the new filter field value, which means that portal row 3, which was "John Smith", is now "Roger Johnson".

Took me a while to figure this one out. Not sure of the best workaround. Maybe my portal "go to" script should check to see that the filter value hasn't changed since last time?