Yes, it is very surprising and very annoying. I hope that the AVAST team checked this topic and will fix the problem very soon because it is really annoying. Yesterday I was watching a movie on Netflix for the first time since the problem started, it was full screen and once it got "minimized", well it was almost still full screen since it takes all the screen but the taskbar was here, so I had to click on the full screen icon of Netflix to go back to full screen.
When playing games it is much more annoying, especially when playing multiplayer games like "Counter Strike" where there are many haters who want to kick people out for unfair reasons, a few ones wanted to kick me out after the game minimized because I got killed because of that