Inline Editor combo box problem,need twice click

Here is an example of combo box
http://snippet.dhtmlx.com/59e429c25

The first click just disappeared in a flash.

The second click will select.

Why? help me

Hello,
We are aware of that issue. The dev team will fix it in the future, but I cannot give you any ETA.

Now, as a workaround, you can return false in the onTaskClick event if you click on the dropdown element:

gantt.attachEvent("onTaskClick", function(id,e){
    if(e.target.tagName.toLowerCase() == "select")
    	return false;
  	return true;
});

Here is the updated snippet:
https://snippet.dhtmlx.com/5/07ec84e73

Hello,
The bug should be fixed in the 7.0.10 version:
https://docs.dhtmlx.com/gantt/whatsnew.html#7010