error in moving business process to next stage automatically

I am moving a business process flow to next stage when a field value is changed

In the on change event of a field I am calling the below function

function caseStatusChange(){
try{
console.log("trying to change");
parent.Xrm.Page.data.process.moveNext(nextStage());
//parent.Xrm.Page.data.process.setActiveStage("d2697a8d-5327-db01-06e6-6557aebe3b8a",nextStage);
}
catch(ex){
console.log("error in stage movement");
}
};
function nextStage(){
console.log(" case moved to next stage");
}

The code works only when I change the value from some other value back to default value. For example if the default value is Yes, it works only when I change it to "No" and then change it back to "Yes"
In other cases it throws error   "Refused to set unsafe header".  Even when I change it to "Yes" it throws the error, but it moves the process to next stage