Gradient/overlay - cant remove it in smaller screens

Bricks Version: 1.5.7
Browser: Firefox 107.0
OS: Windows 11

I have created a gradient/overlay in a section in desktop mode.
I want to remove the gradient/overlay in smaller screens.

When I switch to tabled and mobile mode, the gradient/overlay is still there on the page, but I can not delete it because the gradient/overlay is empty on the left side.

Any ideas or is it rather a bug?