Toolbars are docked or undocked

When I want the 3D digitizing toolbar, I can right-click on an empty space on a toolbar, then click Show Toolbars....

After a long wait I get a submenu where I can check what I want.
When I check a toolbar, it comes up as a tab in the main toolbar.
I expected the toolbar to float, like in V7.

Or I go to the Window menu and click Toolbars....
The dialog comes up without waiting.
When I check a toolbar it comes up floating.
That’s what I expect.

There must be a logical reason for the different behavior.
When I right-click on an empty space on a toolbar, then it’s intended to get a tab instead of a floating toolbar.
True?

Ok then, I try the right-click in the panels area.
Surprisingly I get a new toolbar tab there.
I thought panels and toolbars shouldn’t mix?

this is on the list as RH-75871 Popup for toolbars is slow