Leidos interview questions

Filled out some questions sent by recruiter, had a panel interview, did a coding challenge, met up with a team member in a different city and had a nice talk. I was told I was the top applicant, but then was completely ghosted and never heard from anybody ever a again. Extremely disheartening and feel like I just wasted my time and hope.

Passed the routine phone interview and was interviewed by two managers at Leidos. All seemed to go well until I was ghosted by the HR after the interview. Not a single word of response even when I followed up. Extremely unprofessional.