Hey,Jarry!
I'm sorry that I found another bug for combobox when I add the patch file above.
The 'limitToList' property seems not work under the patch file above.
please recheck this link :
http://sandbox.runjs.cn/show/22axkoljthe bug of reload method for treegrid has been fixed. when you enter something not in the combo list, and leave the combobox ,you will find the text not set to be null but remains the text you entered just now