I want to post a follow up to my previous comments. After having a couple of e-mails to ITronics Customer Support, I hit them up on chat. After exchanging a few messages, it was determined that the probes were bad (mine were from a 2017 replacement). They were going to send me new probes, but said they did not have any in stock. So they shipped me a complete new TP-17 thermometer with the new probes, and told me to use the probes in the box. Using it now, and all seems good. These probes are far more hefty and substantial than the original ones. Fingers crossed/knock on wood/rub the rabbit's foot that the HHH problem is solved.
Shout out to the customer support folks at ITronics for getting this taken care of in an "above and beyond" way.
Shout out to the customer support folks at ITronics for getting this taken care of in an "above and beyond" way.