We plugged the device in, grabbed IP from screen, and went to Firefox. Logging in with admin and proper password gives us an error about the page needing to be refreshed. So we refreshed the page. Same problem. Opened in private browser and it still happened.
Switched to Chrome, and we were able to log in. Changed password as required.
Switched back to Firefox and now it works.
We’ll be testing this again once we complete our usual battery of tests and then factory reset the unit.