Install new Uverse TV box??

A couple weeks ago, the Uverse cable box that controls ONE of our TV's appeared to have gone south. I rebooted it a couple of times as well as rebooting the main cable box to no avail. I called Uverse support, they were unable to reach that box and sent me a new one.

In the meantime, I did a hard reset of that bum box and found that now it works perfectly? I have not yet replaced it with the new box AT&T Uverse sent but it has been working perfectly.

So the question I have (where Uverse support is not taking calls today apparently?) is should I replace the box even though now it is working fine? I question this because I have it connected into my Control4 Smart Home system and it's a royal pain to replace it, and especially with the social distancing, I cannot have my Control4 dealer come out to fix it if I don't connect the replacement box perfectly.

So should I ship the NEW box back? I would love to keep it as a spare since the Uverse cable boxes have been less than reliable (this one is the IPN330HD), although that will apparently incur a $150 charge?