LaunchBox keeps on blinking in the taskbar

When I start LaunchBox (v6.7), it's symbol in the taskbar keeps on blinking like a program that was started in the background, even though there isn't any other program running in the foreground.

The blinking only stops if I click somewhere within the LaunchBox window or open (or maximize) and close (or minimize) another program.

I was using v5.9 before and didn't recognize this "problem" then.