Meta Product Manager interview questions

Went through a friend's referral. From the point of referral to getting a sourcer assigned took almost 3 weeks. I guess it's because PM jobs in FB are too hot. After agreeing the date/time for initial call with the sourcer, the sourcer missed the call. So had to re-schedule. The sourcer then missed the second time. I had to ask my friend to ping HR to find out what's going on, and get the sourcer to call me. After finally getting the initial call with the sourcer, we scheduled first two phone interviews. No prep material was sent to me. One is on Execution, and the other on Product Sense. On the day of the interview, where the first was about Product Sense, but the questions being asked was around Execution more. Later, the sourcer told me that the first interviewer thought that she was interviewing Execution and gave me Execution questions. The second interviewer, who was originally setup to interview Execution couldn't switch to interview Product Sense, and therefore the 2nd interview had to be re-scheduled. The coordination of FB's recruiting team is a complete mess, and there's no follow-up afterwards. I kind of gave up from my side too given what happened and would rather focus on my current job.