Once clicking on the "connector" button, from some shape's toolbox that supports it, the connector "follows" the user's mouse pointer location until it clicks again, at this point the connector is attached to the shape at the target location.

There is an edge case that appears when the user clicks on the connector button and instantly starts moving the mouse around - at this point, the connector is not placed at the right mouse pointer's location.

Attaching video that shows the error.