Okay, I think I see the confusion. Apparently Obsidian always opens notes in Edit mode, when you e.g. CTRL-click note from the navigation pane. If you open note in the same pane, then the edit/preview state is preserved.
Since I use starred notes as a TOC I would prefer to open them in preview mode. On top of that I would prefer to open starred note in the same window, so basically all my wishes related to hotkeys-for-starred-files would be fulfilled if there was an option to open in the selected pane, not new one 