you already have PR, I think it would be a good idea to keep all your records to show that you made efforts to live/integrate in your nominating province (i.e. property deed, job letter, tax receipts, etc..). . When your PR is due for renewal or when you wish to apply for citizenship, you can have these documents to show that you intended to live in your nominating province.
Sometimes people leave their nominating province for job opportunities. The Charter gives you rights to economic mobility and earn a living anywhere in Canada, so it's fine. The condition when it comes the province is really around whether you ever intended to stay in the province that nominated you, or just used it for easy peasy PR and then go to another province where you really wanted to actually live.