I’d never heard of it either, but then it happened with me. My joint sponsor’s AOS & domicile was approved but my domicile was rejected so that took me another 3 months to re-establish, resubmit and get approved. But in my case i hadnt maintained any bank accounts in the last 7 years either. I only had my mailing address, drivers license, passport, taxes and US visits. I re-established by making bank accounts, renting a place, and getting a job. I couldnt even find any information regarding this when i was filing it the first time so i hope this helps anyone in a similar situation