This has been bugging me for years. Logos doesn't consistently show on the Windows Taskbar. See the screenshot below:

If you have the app pinned to the taskbar, the often it's not highlighted to say that it's running. As a result, when you click on it to go back, it tries to load the program from scratch (you get the splashscreen and everything), and it takes much longer to switch.
It's not consistent, and I haven't worked out what causes it to disappear, but it is very annoying.