Buddy, it's better to raise CSE for job change. It's clearly written in website . Please see below :-Also, please is it mandatory to raise a CSE for a change of employment status?.. especially if u have already completed over 3years at the old job which is the cic requirement for my particular CRS points..
Thanks
You wish to report important changes, such as a change in contact information, births, deaths, marriages, divorces, adoptions, changes in employment, withdrawal of application, refund request, or urgent requests. If you are reporting a change in contact information, it will take 5 business days for it to be updated. During this time you should continue to monitor your old contact information