the code from the collision page creating this error is : a.attachEvent("onEventSave",function(c,b){b=a._lame_clone(b);b.id=c;b.rec_type&&a._roll_back_dates(data_copy);return h(b)})
Could you please reproduce the issue in our snippet tool(reproduce => click the “Share” button => send me the new link): http://snippet.dhtmlx.com/5/25bb1fe35
Also, it would be helpful if you will clarify the version of the scheduler you are using, you can check it by printing scheduler.version in the browser console.
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