- Open https://playground.babylonjs.com/#1EBCJY#21 (or most any playground with a PointerDragBehavior).
- Drag the green box to the left, continuing off the canvas onto the code editor.
- Mouse up while still over the editor.
- Mouse over the canvas again.
Result: drag continues as if the mouse button is still down.
Expect: drag to be canceled.
Reproes with latest alpha, but not with 4.2, so it seems like this must have recently broken.