I also see this problem, and it's most likely due to bad interaction between gtk-window-decorator and gnome-settings-daemon. I think gtk-window-decorator does not react to changes in DPI the way it should.
Try opening Settings->Appearance->Fonts->Details... and modify the DPI. All fonts change, except window title fonts.
Changing the title *font* does trigger an update though, so gwd is provably capable of handling it.
I also see this problem, and it's most likely due to bad interaction between gtk-window- decorator and gnome-settings- daemon. I think gtk-window- decorator does not react to changes in DPI the way it should.
Try opening Settings- >Appearance- >Fonts- >Details. .. and modify the DPI. All fonts change, except window title fonts.
Changing the title *font* does trigger an update though, so gwd is provably capable of handling it.