I don't know if I should start a new thread on this topic. But I just realized (as have some others) that on ECAS, my mailing address is the Singapore address I provided at the time I applied for my Permanent Residence, back in 2015.
The home address is the correct address that I provided on my application form submitted in July 2021. On that application form, I indicated that my mailing address and home address are the same. Yet, ECAS strangely shows my 2015 address to be my current mailing address.
I have also read on this forum that there were others with this same problem, and they had their PR renewal cards sent to their old, incorrect, mailing address.
Is IRCC completely insane?