Thanks for that link!
I followed a solution from Elliot and it worked. Here is the email from him:
It may be possible that the fontIcon JS is triggering a ‘change’ on the input. I don’t understand why, but that would explain why the prompt is showing up.
An easy fix is to reset the ACF unload js with the following line:
acf.unload.off();
You could run this after initialization, and it will rest the alert ‘changed’ variable
