Expand current item icon invisible in binder in Grey Matter Light theme

Hi, I was going to log a bug that the icon was missing, Then upon searching this forum, I found a post about dark mode, and found out that the expand is still clickable, If one uses ones imagination and guesses where the icon would be, expand and collapse still happens for the current item. Possibly the colors are not contrasty enough for that particular icon in Grey Matter Light theme.
I switched to Ocean theme, and the expand Icon is just perceptible, if you first believe it is there, and then stare at the spot, you can see it. It’s like a small miracle. Like when you see a stick on the dirt road clear enough to tell it’s not a snake.
Version: Beta (1017011) 64-bit - 14 Aug 2020

This has been filed. Thanks.