If you create_dialog() and perform a uac_replace_* function, it still inserts the rr params (vst/vsf).
vst/vsf parameters should appear only if the dialog wasn't previously created. This may happend if an error occured during create_dialog() function. Please check yout logs for errors.
Also please try to enable the force_dialog parameter and let me know if this problem persists.
Have you solved this issue? Otherwise please update us with your status.
Brett, according to our tests, as Razvan said, the RR param is not added if a dialog was created before calling the replace function.
If you still have issues, please open a new report.
Thanks and regards,