Not sure how to confirm this, but I’m pretty confident of my diagnosis.
I have 220.127.116.11 set for the house at the firewall. The Disney+ app will not load as of a day or two ago. It appears to be getting stuck on an app verification or account verification process. If I move to a different DNS the app fully loads. After that I can go back to 18.104.22.168 and the app works as normal. I’m guessing the verification is cached at that point.