Had a generally good experience with the hiring manager. I was noted that I would be continuing onto the 3rd of 4 rounds total. Due to circumstances on my end, I couldn't take an interview for a week. But just a couple days before the next interview, I was told that I would not be continuing the interviewing process with no reason why and no follow-up to my email.

Typical assessment/diagram questions to see how you think about solutions. Was told no wrong answer because various ways to solve problem. But in fact, they already had the way they would solve the issue in their minds.