These may be ghosts jobs. They ask for a work project after first interview that is time consuming and, once completed quite to their satisfaction, you are invited to an second interview to receive "feedback." They praise your work and then they send you a rejection email. Months later same jobs are posted and re-posted allowing them to collect useful work from countless qualified candidates.

I had the initial interview. The person said that they would get back to me (I applied to multiple positions), and encouraged me that if I don’t get any of the positions I applied for, there would be more coming. After that interview, never heard anything—not even a rejection email.