Keyboard is not working at all in quick navigation.
What is Quick navigation?
That's that thing immediately on top of text edit window. I may have different official name but I could not find any description of it.
Fixed in version 18.104.22.16835 (cycle8)
Author: Eric Maupin
Commit: e0a0a47c7402f6814e0d9e36a74ec4157c806c51 (xamarin/ios-sim-sharp)
Included in Commit: 7aef028bb648590c60ad1c6d09183bb79c84d591 (mono/monodevelop)