I've been trying to watch the CW app on my roku tv but when I watch a show the app doesn't keep it my watch history and when I go back to it it starts me from the beginning of the series
Thanks for posting here in the Community!
Does the issue only occur on the CW app or across other channels installed on your device? If you haven't tried yet, you can remove the affected channel and then re-install it. To ensure the process is successful, restart your device before adding the channel back in. We would recommend doing this from the Settings menu by navigating to Settings > System > Power (If you do not see a Power submenu, skip to the next step.) > System restart.
For detailed instructions, refer to this Support link: How do I resolve channel playback issues?
Let us know how it goes.
All the best,
Kariza