Alt Tab on Windows 10

Hello all. I've searched on the internet and I find many people reporting this issue. On foruns and Jira, but I didn't find the issue here.
Also reports I found are old.

Basically, when i have mRemoteNG opened with at least a putty session, I can't cycle correctly thorough windows applications with alt tab.

• Have mRemoteNG focused
• Alt + Tab to another App -> stays on mRemoteNG (is it focusing putty?)
• Alt + Tab again to another App -> stays on mRemoteNG (is it focusing back mRemoteNG ?)
• Alt + Tab again (third time) to another App -> changes to the next app (say, browser)
• Alt + Tab + Tab + Tab to yet another App -> changes to the 3rd App (say, skype)
• Alt + Tab should go back to mRemoteNG but no. mRemoteNG stays in 3rd place

Any window/app that I focus to, will then be always before mRemoteNG. Unless I click on the putty window inside mRemoteNG then I go back to the beginning.

Is there a way to fix this annoying issue? Don't take me wrong, I enjoy mRemoteNG and have been using it for the past 3 years or so, but this is really annoying!