Windows 10: only 1 keyboard language but keyboard layout keeps changing

Question

How is it possible I have only one keyboard layuout but Windows 10 keeps changing my layout to US? I am not sure when it happens exactly but it does few times a day and makes me crazy.

I have disabled keyboard shortcuts for Shift + Control but can't get rid of Win + Space

I have only one language: English (United States) with Windows display language 'English' and Polish (Programmers) Keyboard layout.

Inputs:

But language bar is still visible in tray and I can switch keyboard layout with Win + Space like here:

Language Bar:

Any ideas?

Solution

Add the keyboard to your current or default language. If it is default after you add it, set your preferred keyboard to default. If it isn't, set it to default and then switch the default back to your prefered keyboard.

You should now be able to remove the bad keyboard layout.