I just noticed my first screenshot doesn't show the problem. I've discovered that as soon as you press the Alt key on the keyboard while the gnome-alsamixer tab is active, the tab redraws itself correctly.
So I'm attaching another screenshot that shows how the tab appears when it first opens.
I just noticed my first screenshot doesn't show the problem. I've discovered that as soon as you press the Alt key on the keyboard while the gnome-alsamixer tab is active, the tab redraws itself correctly.
So I'm attaching another screenshot that shows how the tab appears when it first opens.