Website change for out-of-stock items, every refresh alerts to "change"

So I’m trying to set things up so I can be notified of a bunch of out-of-stock items when the page changes when they come in-stock. Unfortunately despite trying various selection areas, it seems every single refresh period I’m getting alerts for all 20+ product pages of a “change” even though there isn’t one. The pages take a few seconds to dynamically load so I set the delay to 30 seconds but it still thinks there are changes. Making the alerts pointless until I can sort this out.

Here’s an example product page:

I’ve tried selecting around the price + “SOLD OUT” banner + PayPal line. I’ve even tried selecting just the red “SOLD OUT” banner. Same thing.