After edit and remove property grid, there is a js error when click on DataGrid

[c2u]

After edit and remove property grid, there is a js error when click on DataGrid:

TypeError: $.data(_60c, "propertygrid") is undefined
http://jeasyui.com/easyui/jquery.easyui.min.js
Line 8217

Report steps:
1) open testEasyUI.htm in attached file.
2) click on an editable cell on property grid, hold on few seconds wait for exit from the edit mode.
3) click on the "remove property grid" button.
4) select a row on the data grid, the js error popped.