Does it stay hidden, or come back later?
Probably obvious, but if it stays hidden, try destroying it instead of hiding it.
Sorry that didn't work for you.
Mine changed layouts rather than get hidden, but that should not effect much.
Have you tried dropbox to host your capx file?
You may not be able to post a live link, but I think I read you can post a text link to your examples.
Good luck with it!