have kind of similar situation. AOR March 29, in may going to my home country for 2-3 months and then coming back to the current country of residence.
Still not sure whether we should inform CIC on this, but in CSE form i found this:
"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. "
I think this is referring to the permanent change of contact information only
Lets see what others have to say