I used to have Cox cable and the Pandora app always stopped songs after a length of 5 or 6 minutes. I would have to press the forward key to continue to the next song. We purchased a Roku several months ago and the issues disappeared until last week! Now having the same problem with long songs stopping after 5 or 6 minutes. So frustrating! Have rebooted/reset Roku and updated it as well. Seems that it's not a Roku issue since I was having the same problem with Cox. I only use Pandora on the TV and not my computer or phone, so don't know if those devices have the same issue. Thanks for your help!
Moderator Edit: Changing title for clarity