Sorry, autocorrect messed that up. Bottom, not book. I have issues like that with Wallet of Satoshi. Strange.
I’m on the most up to date TestFlight nostr:npub1xtscya34g58tk0z605fvr788k263gsu6cy9x0mhnm87echrgufzsevkk5s and have to pull down on the window ever so slightly then release to get the keyboard to go away 🤷♂️ 
Discussion
I’m no dev, but I’m sure there’s some minor rule that’s just being overlooked to put that bar on top of the keyboard. It’s not a bug, it’s a feature!