Hi,I don't think this is entirely correct. MEC does not make you eligible for an invitation - it allows you to be accepted in the pool of candidates. CRS is what determines whether you get an invitation to apply or not. You need to maintain CRS score up until the point that you submit your application.
I spoke with my MP who has been in touch with CIC in regards to my case and I was informed that my loss of job does not affect my PR application as it happened after the date of AOR.
It does mean that my points were adjusted accordingly in my application (-50 points which puts me below the minimum CRS for my round of invitations) however that has no significant impact on the overall decision as I still meet the MEC and am able to explain my loss of job to IRCC.
Unless my MP was dishonest with me, I am inclined to believe her as well as the information clearly laid out on IRCC's website. Or maybe this is just me being hopeful. In any case I shall find out soon!!
Can you please share what was the outcome of your application?