There definitely some sort of glitch, I would say check your NVC status and see if all documents are still saying accepted. And email nvc and consulate.
They sent batch of interview letters in aug for people DQ in April and some in end of March date.
Last batch was sent out in September 30th, and mostly people in May and half June got letters. And some from Feb 2022, and some from early March they are those people who were skipped in Aug batch.
So its highly possible that you'll get IL in October batch which will be sent out in two weeks. But still I would say email them.
Good luck I'll pray you get your IL in October batch.