ITune will no longer download podcast episodes
I'm having this exact same problem. Here's how it happened for me:
I was in my house about to leave waiting for someone, and it dawned on me to download some new or recent episodes of a podcast. I went into the Podcast app and started them, and then locked my device thinking that the episodes would be downloading. Little did I know they weren't on my wifi for some reason. I found this out when the person I was waiting for was ready to leave so we could go somewhere and I unlocked my phone in the car. At that point I switched over to LTE and the oldest of these 3 episodes I wanted to download started downloading and was completed in seconds. When it got to the other 2 remaining episodes, they both just had the status of "Preparing to download..." With the loading wheel that tells you how much has been downloaded at 0%. Still right now it's like this. Could this just be an issue with LTE, the podcast, or any of iTunes podcasts as a whole?