The toolbar separation line is not present in a new window. This issue is clearly visible when the webpage background is white. If I open the sidebar, the line suddenly appears and I can close the sidebar and the line is still present.
- New window (I open the orionfeedback web to have a white background as example). The line is not visible.

Same with the start page.

I open the sidebar and the line appears.

If I close the sidebar, the line is still there.

The line should be visible when a new window is opened as in step 3.
Version 0.99.136-beta (WebKit 622.1.15.19.2)
Sequoia (15)