alarm resets to "ready" immediately after arming

Hi all -

I have a VeraEdge, UI7 and an ad2usb connected to my FA147C alarm panel. Using the AD2USB directly from my computer, I have no issues and everything works exactly as it should. However, when I connect the AD2USB to my Vera, Vera is sending a message to disarm the alarm. As soon as I arm it, regarless if it’s through the Vera UI, HomeBuddy or directly on the alarm keypad, it will arm, then revert back to disarmed (aka “Ready”).

If I change the PIN code on the Vera config for the Ademco Vista Alarm to something incorrect (like 1234), and arm the alarm from the panel, it works fine.

If I change the PIN code back to the correct code in Vera, it disarms itself. I’m certain that this is being initiated/set from Vera and not the alarm panel itself. Any ideas??