This has been happening to me consistently today as well. It happens about every 10 minutes when I try to watch anything on my Roku. Very disappointing and frustrating when watching sports.
I do not have any network-wide ad blockers, so that is not my issue. Nor do I have duplicate accounts.
I’m shocked that duplicate accounts are even possible. Absolutely atrocious Software QA. Hands down the worst experience I’ve ever had with a streaming service.