Update: We installed a build from a month or so ago and this has now unlocked both phones to be able to use newer builds. While triaging we noticed that although the devices were registered in Firebase already they were being seen as new devices. The only thing we can think of as being the issue is that the Apple Developer agreement when the apps that broke the devices were built had not been accepted. This meant we were unable to add/remove devices, change profiles etc. This has led us to believe it invalidated the profile during that time and by installing the app it somehow broke how the devices were validated until we accepted the agreement and installed a previously known good app. Nothing else changed during the time period that this occurred. Anyway hope this might help someone else who ends up in this state
Topic:
App Store Distribution & Marketing
SubTopic:
TestFlight