Photos keep deleting from shared photo stream

I can't add photos to shared photo streams. I created a stream, and I can add photos to it, but they delete one by one after 10 seconds or so. I had my wife create a shared stream and she shared it with me. Same result. I can add photos to the stream and I see them there for a few seconds. But then they quickly disappear one by one.

ANyone one know why this is happening or how to fix? I already tried signing out of iCloud, doing a hard reset and signing back in. Didn't work.

THanks,