I am using v13.2 but this behavior began with version 13.1.  My clients run web apps using IE 9 - 11. 

When a webdatagrid is clicked, regardless of edit behavior settings, the cursor seems to grab and hold the data grid where clicked and the grid moves around with the pinch until the cursor moved off the grid.  Bring the cursor back over the grid and it resumes this behavior.  Postbacks seem to reset the grid until the grid is clicked and the behavior starts all over again.  I have tried various Edit Grid Behavior settings and disabling AJAX on the grid with no success.

Thanks for your help,