Meta Senior Machine Learning Engineer interview questions

I was scheduled for an interview by three separate recruiters and all three of them did not call on the scheduled date. One of them did this twice after apologizing for being sick for the initial interview, 5 days later. Each confirmed the dates and times via email and never called and never followed up. Extremely unprofessional behavior and a waste of my time.

Recruiter started off by saying because of my experience he will skip the initial coding interview that consists of questions around data structures and algorithm. So I got fast forwarded to the second round with an ML OPS manager, which went quite well and he requested I move onto the next final interview which is a 3-4 hour panel. the recruiter called me with positive feedback as well and said that he will work on scheduling the panel. Next day i get a call from him saying unfortunately i have to do the first round coding interview... I declined taking that interview