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Happened to me once so far. I was using the choose existing option and once I hit use it crashed.
 
it happened to me when i was attaching 3 pictures.. decided to do it one by one and it worked
 
Yep- happens a few times a day here too. Will eventually work, but quite a few crashes when trying to attach photos.

128GB iPhone 6 Verizon iOS 8.0.2
 
it's happening to my brother's iPhone 6+ every time he tries to add a picture. I have the iPhone 6 and don't have any issues with it at all. No lag issues or any of the issues he has *knock on wood*
 
I started consistently having this problem about a week ago on my 6+. I sure hope 8.1 fixes it as it's incredibly annoying.
 
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