Something similar happend to me as happend to Ayayre.
I don’t remeber for sure, but I think it was the title that suddenly was showing as menu title! I have set the menu titles manually, so it wasn’t empty. It could also been the alias, I’m not sure.
I thought it was me doing something wrong, it just happend on one installation. And now I can’t reproduce the problem, everything works as it should, even though I haven’t made any changes! Stange.
Just wanted to report this so you guys don’t thing Ayayre is just dreaming