Steps To Reproduce:
- Create new empty project.
- Enable use mouse for touch events
- Click play in editor
- While holding any mouse button (in game), press escape to quit game.
- Right-click to try and move in a graph to see the bug (selecting instead of drag/move).
How to fix (untill it happens next time):
- Play in editor
- Click mouse in game view
- Quit game
Or restart the editor.