Ok. I have this weird bug in Podcast app (updated the os to iOS 8.4), for some reason all of my subscribed podcast with "explicit" label can't be played at all. Instead I get the pop up message "Restriction Do Not Allow Explicit Content".

It was fine even after I updated to 8.4, but out of the blue, the restriction pop up happened. So I check the Retriction Settings under General & it was off.

I enabled the restriction & then disable restriction. Now my podcast is playable.

This bug is similar to muted notification sounds where I need to turn on & off the "Do Not Disturb" mode to unmute the notification in the previous iOS 8.3.

I'm using iPhone 6+.