Anthony,
I figured that was an issue. Seemed like changing to "Manual" mode behavior should be more of a run time thing and not changing actual configuration. For me, "Manual" should mean that the user is responsible for calling Resize, not some other mode.
Also FYI, on the above video, the button text is also not showing for the blue button. I believe this is also a responsive UI issue.
Sorry for the late response, I somehow missed your post notification.