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I use a window manager, namely: https://github.com/nikitabobko/AeroSpace

It creates virtual workspaces and assigns windows to that workspace. After having Orion open for a while, there is a ghost window, you can see it in mission control:

notice that the icon is not centered - mission control centers over the group of windows because I have "group windows by application turned on"

This indicates to me that there is a second window to the left of the main one in my screenshot. This happens frequently, and the only way to restore Orion to a single Window seems to be by hard quitting with cmd+q and relaunching.

This causes me particular pain, as my window manager selects the ghost window when I swap back to that workspace, and a result, it doesn't properly switch to that workspace.

I expect that these ghost windows are never created and/or closed immediately when they are no longer needed.

This is what I expect the mission control to look like, i.e. no ghost window:

0.99.132

Catalina (10.15)

    At first I thought this might be caused by the preview popups when you click a link from an external application, but the bug seems to happen even when I haven't clicked one since my last hard restart of the browser.

      Ah, I've figured it out:

      When my focused app is Orion, there is no ghost window.

      But when my focused app is anything else, the ghost window appears.

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