Storyboard navigation bar title text attributes, Title Font not working

In Xcode 16 (16.2 at the moment) I'm unable to set the title text attributes Title Font for a navigation controller's navigation bar. If I pop down the little popover for the title text attributes Title Font in the attributes inspector for the nav bar, no change that I make there actually sticks. And even though Custom font is chosen by default, nothing that I do allows me to choose a font. And that's what I really want to do: I want to set the font as Chalboard SE Bold size 20.

This is the app's launch screen storyboard, so I can't use code as an alternative.

Is there some way of setting the font and size that isn't so obvious, or is this an Xcode bug (one that others are seeing as well)?

I was able to get this to work, but it was incredibly difficult and unintuitive.

1. In the popover, set the Font to a style, such as Body, even though that isn't what you want, and click Done.

2. Now bring up the popover again. Change the Font to Custom, and now you will see the Family, Style, and Size fields — and they will actually work.