This particular Google App is Google Keep

Works fine on the main monitor, on the second monitor the app doesn't use the pinned spot.

My slight OCD senses are tingling. I've seen this for a while now, just now decided to say something.

I've seen it on Windows 10
I'm currently on Windows 8.1
Current version of DF Pro 8.1.2

Let me know if I need to provide any other information