Forge App Custom Fields Refreshed on Issue View Repeatedly

I have created a few custom fields using Forge. However, when I add them on issues, they are re-rendered many times while surfing over the issue page. I was wondering what triggers a refresh on those Forge app created custom fields. I have two triggers in the background which updates the values of custom fields when an issue is commented or its status/assignee has been changed.
Any help would be appreciated.