F4 RESTRICT BAdI - bypass before prompt

Hi

I've implemented the F4 restrict Badi for a specific variable and it works very well. however, it appears to run multiple times before the variable prompt popup, which causes a 20 second wait for the prompt to appear.  Is it possible to bypass the execution of my code in the F4 restrict Badi before the prompt?  I don't see an i_step or similar local variable in the BAdi

thanks

Pieter