Power BI Custom Visual Synching across multiple pages

[AngeloCustomVis]

I have a custom visual that is a text box and filter all values on the page with correctly.  

In capabilities.json i have enabled the supportsSynchronizingFilterState and set it to true.

I have also set up persistentstate so that it keeps the values when moved off the page then returned you can see what has been input.

I see the visual in my sync pane.  But it does not sync across to other pages where syncing is enabled. 

How can I accomplish this.