I have seen this happen on Reddit. Sometimes, it happens because they don't ship your file in time to the field office, there could be other reasons. Usually in those few cases where it happens, people had a new interview date within 3-4 weeks, but other people did wait like 5-6 months with no news. I hope you are not in this boat. Good luck!
Also, did you recently change your address or move to fall under new USCIS FO jurisdiction?
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