Meta Developer interview questions

The whole process took about two months. It started with a 30-min recruiter call, then a 90-min online assessment with four questions. I didn’t have time to finish all four, but somehow passed that round. The next step was a technical screening with a LeetCode-style question, and then the final onsite loop: 2 LeetCode rounds, 1 behavioral, and 1 system design. After that, they scheduled a behavioral follow-up, saying I didn’t show a strong enough signal for “Navigating Ambiguity” and “Driving Results” in the previous interview. I did the follow-up, but then got rejected. The only feedback I got was that they found a “technical gap” in my knowledge — no details at all. Still not sure what that means. If there was a technical issue, why make me do a behavioral follow-up instead of addressing it earlier? Felt like a waste of time.