Hi Kent, thanks so much for your explanation and your kindness. I understand your point of view.Like Ayeetee said above (and you said it yourself) that 3 years ago, you did not complete your Master Degree, then your higher education level is Bachelor only. So it is not a misrepresentation in your education.
I don't see any risk in adding Master's degree in 2019, especially it has been verified by WES
Please prepare your PR application for this invitation by strictly follow guidelines on IRCC website. You will find out how you should let IRCC know about your Master degree 2019.
Good luck
I will try to call IRCC to ask for this tomorrow to get the best advice or confirmation that this could be considered and valid in my application!