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