When the computer first boots up, or when I close all open programs, no screen appears when I do ALT-Tab.
When I open a program, such as a browser or MS Word or Windows Explorer, or I open all three, with Malwarebytes NOT opened, and I do ALT-Tab, the Malwarebytes Tray Application icon will be one of the icons in the separate screen that appears showing all open programs. If I select the Malwarebytes Tray Application icon, nothing happens; the separate screen just closes.
If I open Malwarebytes and do ALT-Tab, I will then have two Malwarebyte icons: One icon for Tray Application and one icon for the Malwarebytes program that is open.
If I stop on the Malwarebytes program icon, Malwarebytes comes to the forefront.
If I stop on the Malwarebytes Tray Application icon, the separate screen just closes.
As soon as I close just the Malwarebytes program, ALT-Tab reveals only the Malwarebytes Tray Application icon.
It has been this way since the 3.1.x version. It did not happen in versions previous to 3.1.x.