Emulate 3 button mouse causes weird glitcht when alt tabbing from windows to blender window

Emulate 3 button mouse causes weird glitcht when alt tabbing from windows to blender window. It seems that once you swap back into the blender window you need first activate the window by left click. In other 3d programs you dont need to do this. You can basically jump right in so I wonder if this is a bug? Its a bit annoying since I am used to start to navigate right after I alt + tab the Blender window open.

Below is a video to demonstrate similar issue. I am atempting to zoom in here with ctrl + alt + left click. The zoom does not happen when you swap the first time.

Normal behavior as for me.

So you just get used to first left clicking to activate? I wish they could improve this since it works with the other 3d packages without the activation