Script attached to an open page event to set focus to a form field fails to perform as intended

For those adept at creating interactive PDF forms who are also well versed in JS, I am sure most would agree that setting focus to a form field when changing pages on a PDF form is very basic requiring a simple 2-line script attached to an open page event In reality, if the script provides the correct syntax and spelling, it should perform as intended without issue.  However, I seem to have run into a connundrum using the same methodology to set focus to a form field on a page added to an interactive PDF form using the template spawn method whereby the aforementioned methodology failed to perform as intended. In short, once the page had been generated/added to the form instead of ending up on the form field set to focus on the spawned page the form reverted to the form field set to focus on the previous page. Furthermore, I was unable to navigate to the spawned page from the previous page whereby my attempting to do so ended up with the same result, figure? All considered, am I missing somthing to make this work or does setting focus to a form field using a script attached to an open page event required to be a page that doesn't serve as a template? If the answer is something simple, I must admit that I am embarassed to have posted this question. Thank you ahead of time.