Yeah, same here, though when I view the tab address book, addresses are still there, but when I'm going to send then I tried to use the address present on the address book by clicking the My addresses, it's all empty.
Maybe is then some kind of bug that came with new update. Hope they will fix it soon and I will try to contact the support to see if there is any kind of solution.
I was very unpleasantly surprised when I saw my addreses are gone, so far I only had good experiences with Mycelium, it was my favourite wallet.
