I have an iPhone and an iPad, both using the same Apple ID. I have a shared photo stream, that I use to share photos with other people. In the past, I've been able to post photos on the shared photo stream from either the iPhone or the iPad. The shared stream would then automatically update on the other device. However, starting a few days ago, there seems to be a disconnect between the same shared photo stream on the devices. I can post photos from the iPhone or the iPad, but they don't show up on the other device. The last part of the shared stream now looks different on both devices, as I have posted different photos from both, with no ability to sync. How can I get them to sync again? Thank you.