I'll have to try to reproduce this again.
Last night, I snapped a picture with the invite photo camera, and sent it to my friend to try to join off of them. Typically, the invite photo is persistent and stays the same until it is changed or cleared.
I was going to send the same invite photo to another friend, but the photo cleared itself, and I had to take another photo.
I noticed that it was persistent, and non-persistent in some cases, such as online status, and platform status. I need to play around with it again to see what does and doesn't work. Let me know if you're having trouble with repro.