JavaScript triggered twice in Form Onchage

Have you resolved this issue? I was experiencing the same problem where an OnChange event function was being triggered twice, I did manage to resolve it so hopefully this helps

I noticed this happens only right after the record gets created, and the reloads in UPDATE type.

Seems like the problem happens because the onChange event handlers are not being cleared properly (maybe product defect) hence added twice and triggered twice.

I have been able to avoid this by adding a function that adds the OnChange function at the Form OnLoad, this allows you to handle when you want to attach the function to the OnChange event. Something similar to this:

FNS = {
OnLoadMain: function (executionContext) {
    try {
        
        FNS.OnChangeEvents(executionContext);
    }
    catch (ex) {
        var alertStrings = {
            text: "Function : OnLoadMain" + ex.message.toString()
        };
        Xrm.Navigation.openAlertDialog(alertStrings);
    }
},
OnChangeEvents: function (executionContext) {
    try {
        var formContext = executionContext.getFormContext();
        if (formContext.ui.getFormType() !== 1) {
        
            formContext.getAttribute("statuscode").addOnChange(function (executionContext) { //Status on change only upon update to prevent event from being added twice (product bug)

                //do you stuff here
            });
        }

    } catch (ex) {
        var alertStrings = {
            text: "Function : OnChangeEvent" + ex.message.toString()
        };
        Xrm.Navigation.openAlertDialog(alertStrings);
    }
},
}

The only thing left is to place the event handler under the Form