Task drag too fast in Gantt

First I was using dhtmlxGantt in my project (AngularJS single-page application), drag and drop tasks worked fine.
After I added dhtmlxChart and dhtmlxTree, when I drag a task, it moves too fast, so it moves farther than it should. I suppose the onMouseMove event is firing many times.
Then I deleted dhtmlxChart, thus drag and drop works fine again.

How can I fix this? I’m using the free versions: dhtmlxGantt 2.0, dhtmlxChart 3.6 and dhtmlxTree 3.6

Try to use the latest version of gantt, from the next post

Could you please post a simple example of drag and drop tasks?

D’n’D is enabled by default, so you can check any example from the package (gantt.zip/samples)
Here is online demo
docs.dhtmlx.com/gantt/samples/01 … _json.html