Recruiter call followed by a HM interview, followed by a round of 2 technical interviews (coding and SD). I solved the coding round problem with pretty much no negative signals, but lo and behold I had the rest of my interview process terminated midway with the other scheduled interview canceled because of 'poor feedback' with zero explanation (ghosting to follow, true to form as seen in other responses here). I've seen my fair share of interviews and rejections (tons of rejections!) in the industry and had nothing but positive takeaways from those experiences - this was quite simply by far the most bizarre and unprofessional experience I've had.