Viewer: mouse click scrolling vs error dialog

[egmont]

mcview /usr/share/man/man1/bash.1.gz (on Ubuntu Yakkety; bash-4.3)

Scroll by pressing PageDown or Space. After the 4th time of pressing this, an error box appears: "<standard input>:2295: warning [p 19, 1.2i]: cannot adjust line". That's okay.

Now start over, and instead of the keyboard, scroll by clicking on the bottom third. (Release the mouse button, do not keep it pressed.) The error dialog flashes up for a moment, then disappears and the contents get stuck scrolling until the next mouse click (that is, the mouse release event got lost because of the dialog).

Expected: The same scrolling experience as with keyboard.