I switched to a workspace that usually has only one saved window. At the beginning of restoring the workspace, I saw a second window appear momentarily and then get overlaid by a larger, full-screen window.
When the workspace was fully restored, the Window menu listed two windows, with the frontmost, larger window checked. When I selected the hidden window to bring it to the front, nothing happened.
I minimized the frontmost window to the Dock, revealing the second window.
At that point, selecting the minimized window from the Window menu also has no effect.
[copy of my formal bug report]
When the workspace was fully restored, the Window menu listed two windows, with the frontmost, larger window checked. When I selected the hidden window to bring it to the front, nothing happened.
I minimized the frontmost window to the Dock, revealing the second window.
At that point, selecting the minimized window from the Window menu also has no effect.
[copy of my formal bug report]