Full Screen on second monitor bug

[Kadet]

1.6.4/5 64 bits / Windows 10

I check option to view image in Full Screen on second monitor, but when I press F11 image is on main monitor (when is XnView).

[xnview]

fullscreen from browser?

[Kadet]

I click F11 after open image.

[xnview]

it's only when pressing F11 in browser