I have the Group factory button on my lister. But I don't have a Group column assigned to any of my folder formats.
So that I don't have a column that I don't need when I'm not using it. When I enable a group then the column is created, and is removed when I go back and choose 'group > none'. If I leave that folder the group is still active, with its column, which is fine. But if I return to that same folder the group column is no longer present, even though the group is still active. And it removes the horizontal scroll bar and I can't get it back in that tab.
I just use the word "factory" with something that was made by the devs, as opposed to a user created thing. In this case the button I'm talking about comes with Dopus, so it's factory:
The bug is that when I leave a folder before resetting a set group to 'None' that folder is going to glitch out if I come back to it. The group will still be set but there will be no group column and my horizontal scroll bar disappears permanently for that tab.
I became confused with your first image, but then I kind of got it.
When grouping the file display and including the Group column through Preferences, the state is persistent here after all navigation changes.
By using the button. Click the button and you get the group drop down menu.
Groups are off by default (none). Choose a group and the group column appears. Choose none again and it disappears. It works fine except when leaving and coming back to the folder that the group was first set.