Thanks for reaching out here.
With this type of settings change, you might try a channel refresh to see if this clears up the issue. Follow these steps, in order:
1. Remove the Netflix channel from the Roku home screen by navigating to the channel tile, pressing the * key and choosing 'Remove channel'.
2. Restart your Roku device from Settings>System>System restart
3. Add the Netflix channel back once more and sign in again.
This should help clear up that type of issue. Let us know if you have any other questions, or feel free to follow up with the channel provider directly.