onX Full Stack Engineer interview questions

I was referred by former co-workers from a previous mapping application. The interview process was about 6 weeks long with about 6 rounds; recruiter screen, hiring manager screen, lead engineer screen, take home technical assessment, 3 person panel interview to review the take home, another hiring manager and finally a product manager interview. The interviews did not seem too challenging and the vibe was positive on all and I kept moving on. The technical wasn't too difficult and the review seemed like the panel was viewing the pull request for the first time and didn't have many questions for me. Ultimately, I was not extended an offer and received no feedback as to why. The communication was disappointing, which raised red flags on my end considering some interviewers thought I was interviewing for different teams.