Thunderbird Meadow – Dark theme menus fixed teal background

Using the system color theme, where my Windows 10 system is set to the dark color theme, I see Thunderbird 153+ Meadow showing popup menus with weird dark teal background. The standard Window menus (File, Edit, ..., Help) appear to use slightly different background, which still doesn't match my system color. Is there a setting I'm missing to have these menus shown with my system dark color theme (like current Fx, and previous Tb versions)? I'm using my system color accent setting, but I'm seeing changing this Tb setting doesn't seem to affect the menus background. I've also noticed I'm not seeing this on Windows 11 – the menus background is fine, although on Windows 11 I'm still noticing this teal "accent" appearing in certain elements of the popup menus, f.e. the color of menu item keyboard shortcuts.