I applied online via a job posting. A recruiter reached out to me to set up a phone screen; the recruiter was pleasant and moved me through to the next round which was a 1x1 interview with the person the role reported into.
Less than 5 minutes into the call I could tell that this person wasn't interested in hiring me and this was more of a fact finding mission to better their own processes. I would speak about how I would structure things; what clued me in that I wasn't moving forward was this person said verbatim "I like that idea, I'm going to steal it." I responded with "You wouldn't have to steal it if you hired me." This is what made it clear I wasn't moving forward even though we had been speaking for a handful of minutes. FWIW, I am a female and I feel like that played a part in the decision making since this person's mind was made up so quickly.
My ideas and my own thought-through processes are good enough for you to steal from me but not extend an offer to join the team? Don't tell me my experience has merit and is worth duplicating within a company then send an automated rejection.
I did not walk away with a good feeling from that interview and it reflects on how I view this company. Several other interviewee's experiences seem in line with my experience.