Unwilling and unwitting victim here of USCIS' inefficiency and errors regarding ROC permanent GC processing.
My 10-year GC from ROC arrived while I was outside the USA. Thankfully, my I-551 GC stamp was valid until August 28 of 2018. I came back August 19.
Nevertheless, I had to undergo secondary screening even though I showed the CBP immigration officer my valid I-551 stamp and photo evidence of my valid 10-year GC. I detest being taken to secondary right after CBP immigration counter because I know I'm an LPR.
USCIS prints an error on the 10-year GC yet I have to bear the uncertainty and delay caused by secondary inspection. Nice. Not.