Hi Andy, I’ve seen quite a few people do it, as they were away from their home country on a business trip or on a vacation. So you should be fine!
You must however, submit a detailed explanation using the webform link mentioned in your PPR email and IRCC will then issue a new PPR letter. Also, you can first call your nearest Canadian consulate for confirmation and then once you receive a confirmation you can proceed with the letter but do it as soon as possible to avoid missing your deadlines.
Congratulations and All the best