dock app switcher cmd-tab

I have Parallels 17.1.0. When I start apps in the Windows 10 Guest OS, there's a roughly 50% chance the app icon won't show up in the dock or when I invoke the app switcher with Command-Tab. How do I fix this?

Hello, I constantly use Cmd-Tab (sometimes called App switcher) to switch between various applications on my Mac, including a Win7 VM (full screen mode). The first thing I never understood is why I see two icons for Parallels when i hit Cmd-Tab: one for Parallels Desktop (red arrow) and one for...