What browser and OS is this?
I’m using Opera on Windows 10. Haven’t tested this in other browsers.
Even styling the options I couldn’t actually style that option which is using disabled since there is no value in that option. I’m not really sure if I was missing anything there, but I think that particular browser is just styling it like that.
Looks like Brave styles it the same way and in Firefox it looks good. Maybe this is a chromium thing.