MacOS: closing the window should not close the app

When I click the red bubble in the WorkFlowy window, I expect the window to close, but I also expect WorkFlowy to keep running. What I mean is that (a) the 'app running' black indicator dot should remain visible in the MacOS dock, (b) when I click the WorkFlowy icon in my doc the app should re-appear on screen instead of restart (which is time-consuming and confusing), and (c) I should be able to cmd+tab to WorkFlowy after having closed it using the red bubble.

This is normal behaviour in any other app that I use, bar WorkFlowy. It catches me out multiple times a day. The only workaround I know is to hide (cmd+H) WorkFlowy instead of closing its window (cmd+W).

In other words: I expect a different behaviour when I close the WorkFlowy window (cmd+W) compared to when I quit the WorkFlowy app (cmd+Q). Now, both actions incorrectly result in WorkFlowy quitting.