I used to have various script that open in Dolphin specific folders but since 2-3 weeks instead to open in the instance already opened, start a new instance.
Do you know if it is something planned in KDE or it is a bug?
Do I understand right, you want that it opens a folder in the same instance in a "tab"?
Maybe then you need "Settings -> configure dolphin -> Startup -> General: -> check -> Open new folders in tabs"
But this only works with
~$: dolphin . & dolphin .. & dolphin <folder> &
you open dolphin with three tabs,
but if you start dolphin like
~$:dolphin & dolphin &
then you have two dolphin instances/windows.
So if you specify a folder to open, it will open a new tab in the running instance, but if you do not specify a folder it will open a new window (like dolphin --new-window), with that setting!
As example I open dolphin with a click on a folder.
Next on konsole I execute:
dolphin /tmp
Open a new instance instead on the one already opened.
Before this wasn't happening so I was thinking a bug or something new on KDE.
Did you check the settings?
Here it is working like you want, but with that configuration.
You were right that option fixed the issue.
To me the text associated it wasn't clear.