font scaling regression in gnome-3.34 when close to edge of screen

I have two screens: a monitor and a hidpi laptop screen on the right. When a gedit window is close (~15 pixels?) to the edge between the two screens, I get very pixelated fonts. Compare the two windows, with the exact same font config in the screenshot (upper: good, lower: bad). This behaviour is new with gnome-shell-3.34.0-1.fc31.x86_64.