Mutt redraw issues?

Is anyone else having troubles with how mutt redraws the terminal? In a nutshell, I’m seeing tons of slow/lazy redraws. For example, after I quit a message and return to the index, the bottom of the message remains on the screen for a very noticeable second or two.

macOS 10.2.6
mutt 1.12.0
iTerm2 3.0.5