Same issue. For any series started in Max since the switchover, the app does not keep track of all episodes watched on a given session, except for the very first one. When I return to the show later that day or next (for a new session), it asks if I want to start with episode 1 regardless of where I actually were. So I manually choose the correct next episode. And when I end that new session, only the episode I manually started with is recorded as having been watched, not any other ones. Then at next viewing session, the erroneous cycle repeats!
Observation: I had two series in-progress when the switch took place, and both of them picked up exactly where I had left them while the app was HBO Max. The issue, at least in my case, is if the show is started in Max.
Solutions I have tried: I have signed out (not just exited) from Max, deleted the app, done a system restart of Roku, reinstalled the Max app, restarted Roku again, signed up again into Max, restarted Roku once again… and the problem is still there! I see lots of similar complaints on Reddit.
At this point I will do nothing else and wait for a technical resolution from either the app people and/or Roku techies. Someone deployed a troubled app, and it’s only fair to users that a corrected version be re-deployed. Or cancel the Max subscription. Many other options out there that actually work.
