When i use javascript function to move next stage (formContext.data.process.moveNext(callbackFunction))

on a dirty form it requires fist to save the form. So I save the form and call moveNext function.

moveNext function itself causing second saving - so the process is slow

But when i click the button "Move Next" on a dirty form - it saves and move next in one save - so the process is faster

How can I prevent this double saving when moving next on a dirty form with javascript? Can I call the same function that the Button uses?