In the settings, I configured that the laptop should do nothing when it is connected to power supply and inactive. But it does go into suspend mode when it is connected to a docking station (thunderbolt). Is this intended behaviour? This looks like a bug to me. At least that’s not what I want. 
Can anyone confirm the problem or give me a hint as to what I might be doing wrong?
Thanks a lot
Martin
(Arch Linux with KDE Plasma 6.2.2)