With App geocaching in android, there are many difficulties to load a picture in the message center, for example when answering questions to the owner (EC, virtual...). The picture in draft mode is in fact not loaded in the final message, wether the text is ok. No info displayed about a failure, nor a retry mode. It may be linked to the network quality, the picture size, ...
I suggest, a minima, to display confirmation or retry pop-up. Maybe also propose to resize the picture to load, quality is not the main expectation in the message center.
I always face this issue, I thought it would be fixed without request.