TV Series Slow Horses not showing anything past #3, when trying to watch 4, 5, and 6, it plays 3.

Season 5 of Slow Horses recently started and I watched episodes 1, 2, and 3. When we went to watch 4 it played 3. Same for episodes 5 and 6. Thought maybe they were not out yet so waited a week and tried again and it still does not play 4, 5, or 6.