Removing, re-adding TUI hierarchy causes it to display nothing

[bww]

Removing a view hierarchy containing TUI content from a window and then subsequently re-adding the same view hierarchy (e.g., to toggle between two different top-level views or something) causes the TUI content to display nothing. It's actually there and still seems to get key events just fine, though.

Specifically, I've got:

• NSWindow
  • NSView
    • NSView (this one is switched out)
      • TUINSView
        • TUIView...

Switching out the view noted above with another view, and then switching back by re-adding it causes the problem.

I've been poking around a bit, but I have no idea why this would happen.