I-140 is not yet filed. I am planning to get my H1B stamping & Canada landing done in next 1-2 months and then ask my employer to file I-140. But as you said, its always good to double sure with lawyer.
OINP - Outland Online
PPR Date: May 01, 2018
Passport Delivered to CPC Ottawa: May 07, 2018
PR application details in MyCIC changed to approved: May 08, 2018
Return Tracker Activated Date: May 09, 2018
COPR delivered: May 11, 2018
I think my case is pretty similar. I have my canada PR approved and I am planning to go canada for 1st time H1B stamping as well as landing. I just have PERM certification done. Will that cause any issue while entering back to US ?