IRCC has not provided any calculator in which you need to enter dates you were absent from Canada and that clearly states that whether you are eligible to apply or not in case of PR renewal. Comparatively they have provided such calculator that clearly states that you are eligible to apply or not based on the 5 years counted backwards from the date you sign your application in case of citizenship.
So I guess IRCC is a bit lenient in case of PR renewal.
There are so many people who end up in secondary review when they go to renew their PR card. Definitely not lenient. CBSA doesn't always notice that you have not met your RO when you enter the country but you will still have to meet your 730 days within 5 years.