I tried to find a use for the detached cursor behaviour, but when I try to use it away from the actual cursor like over the tracks field, it just glitches out.
It makes me doubt that the detachment is by design.
It´s not a bug. It´s a new behavior.
And there are so many great Zoom commands in Cubase - It is more practical and saves a lot mouse clicks…
For the old behavior: hold SHIFT + mouse up/down in timeline.
Please note this bug report itself is about the fact that the playhead detaches from the mouse at all. I only further prove how broken this is, whether you can recreate that or not.