I'm a dev by trade, so I'll try to explain this using dev terms:
So I'm using Logos 9, which I just installed on my Surface Go 2 (M3 processor), and when I try to drag a panel from the left to the right, or vice versa, something is "un-dragging" the tab, so that it is deselected by the time it gets to the other tab. I can just barely see the custom drag panel from the tab, and I can, momentarily (For less than a second) see the target tab highlight location, but then it is deselected by the time I perform the drop using the mouse.
For non-devs:
I can't rearrange tabs in Logos 9 at all.