My wife filled out I-130 applications for my mother-in-law and father-in-law back in March and June of 2022. Both of their cases got approved yesterday. For my mother-in-law's case, USCIS is forwarding the petition to NVC in NH, but for my father-in-law's case they've asked him to fill out Form I-824 (please see attached image). Both of them are overseas and both applications were filled out the same exact way. So we're trying to figure out why my mother-in-law's case was sent to NVC, but for father-in-law's case USCIS asking to fill out Form I-824 for which we would have to pay another filing fee. Anyone had any similar experience?