Eye-Fi bug on iOS 7.1
I recently noticed that my photos were losing a majority of their EXIF data. I thought it could be something in my workflow (x100s > Eye-Fi App on iOS > VSCOCam, then an IFTTT action that backs up to Drive into subdirectories). After resetting my camera, apps, IFTTT recipes, etc.. It came back to the Eye-Fi transfer, as all the EXIF data was still intact on the card itself, but would fall through upon transfer.
I reached out to Eye-Fi support..
"We are aware of a bug between our application and iOS 7.1 resulting in a loss of exif data. We are presently looking into what the cause of this bug is so that we can determine the best course of action in correcting it."