Snap layout slide adjuster won't disappear

I use the snap window function a lot because I have an ultra wide monitor. However, I'm finding the slider to adjust the window size stays up even when my mouse isn't hovering over it. I have to keep moving the mouse over it to make it go away.

I've tried re-starting windows explorer, turning the feature off and on again, disabling transparancy effects but nothing seems to work. Is this an issue anyone else is having?

I have the same issue on PC and laptop