Copy paste from a similar question a few days ago:
My two cents: nothing in the current citizenship act says that you cannot leave Canada and go work abroad while your application is in process. However, it appears that CIC resents those who do, and since they cannot legally deny their application, often they try to make their life harder by giving them a RQ and extending processing times in hopes that they will fail to comply with their PR requirements (you can only be abroad for 3 out of 5 years). Hence the reason they are trying to change the law and introduce an intent to reside clause.
The main takeaway here is that you have the law by your side. CIC may not like it, but as long as you meet the requirements, they cannot legally deny your application.