When using all of household Roku devices Xfinity apps Last Watched option, if selected an HD channel such as (for example) 1030, the device posts the non HD version channel 4. Started yesterday and continues to today. Very annoying!
Does the issue only occur in the Xfinity channel or across other channels installed on your Roku device? If it's just on one channel, removing then re-installing it may help. To ensure the process is successful, follow the steps below making sure you restart your Roku device before adding the channel again.
Remove the channel: Highlight the channel tile on your home screen and press the Star button to open the options menu. Select Remove channel and confirm.
Restart your Roku device: Restart the device from the settings menu. Go to Settings > System > System restart > Restart.
Re-install the channel: After your Roku device restarts, visit the Roku Channel Store and add the channel again.
If the issue persists from one channel after attempting the suggestions above, videos from other channels play fine, contact the channel provider's customer support team to report the issue and get help.
Channels on Roku are maintained by the channel developer themselves. There's likely an issue within that specific channel that needs to be addressed with an update from them.