As long as you maintain your PR Status in Canada, you should be fine. If you are staying in Philippines more than 6 months they can ask for Police Clearance Certificate (mostly they don't ask, but in case). Consider that you have enough income to show that you can support your family if you do not return to work on extended period. If you have a baby younger than 1 year, they may consider that as reason for not working. Family visit to home country does not harm sponsoring eligibility anyways!