Operating system: Arch Linux
Graphics card: GTX 1060 6GB
Any version 2.8
Short description of error
Sorry, I do not know how this cursor is called correctly.
I will call gizmo.
When selected, gizmo shows the center of the selection.
When sequential allocation shift.
Or when you select the loop.
If you select by pressing Ctrl, gizmo remains with the first selected item.
If you switch to object mode.
If you change the selection element (vertices, edges, faces).
If you change the mode (Transform, Move, Rotate, Scale)
Gizmo appears in the right place.
Exact steps for others to reproduce the error
Start the default scene with the cube.
Switch to edit mode.
Select all and subdivide several times.
Select item, select another
See where is gizmo.
Make sure that gizmo is near the first selected item.