Podcast This episode is currently unavailable from
My wife and I both have iPhone 6's and share the same iTunes library stored on an iMac. Occasionally and randomly, certain podcast episodes will not play. The message "This episode is currently unavailable from (Podcast name)" pops up. We both have Use Cellular Data turned on in settings. iTunes Match is NOT turned on. I can't figure out how to overcome this random unavailability.
iPhone 6, iOS 8.3