dropbuttons missing styling

@joachim Please provide screenshot and explain this issue in detail so it can help to find the exact issue. Thanks!!!

Go to content admin.

The dropbuttons don't have an outline or a background.

Hi @joachim

I have installed theme and set as Administration theme and Default theme but I didn't find the exact issue in Content admin. So please provide few steps and Screenshot to find the issue.

Thank you!!!

Create a node, then look at content admin, then click a dropdown.

The things behind the dropdown show through it.