Symptoms
When using previous.field_name in after BR it in some cases doesnt respect field changes.
Diagnosis
In order to replicate the issue I have written a log statement to print current and previous value for a field such as name using same code looks like below.
(function executeRule(current, previous /*null when async*/) {
// Add your code here
var sDebug = '';
var preValue = previous.name;
var curValue = current.name;
var gru = GlideScriptRecordUtil.get(current);
gru.getChangedFields(); //Returns an arrayList of changed field elements with friendly names
sDebug += gru.getChangedFieldNames(); //Returns an arrayList of changed field elements with database names
gru.getChanges();
gs.log("Location afterBR=" + "preValue=" + preValue + " curValue="+ curValue + ' sdebug=' + sDebug,'vutil');
})(current, previous);
