Comment 6 for bug 235983

I can see the same bug. You need to turn off screen's folding of long lines, typically by pressing "C-a r", then it's trivially reproducable. You can get rid of it again by pressing C-a r. It looks like something in screen isn't repainting the line correctly when something fills the complete line, or something along those lines.

(I'm on hardy, real HW vs virtualisation does not have anything to do with it)