Urbint Site Reliability Engineer interview questions

Went through 7 different interviews with Urbint. They kept throwing random interviews after telling me it was the last round. Told me I was going to get an offer, they beat around the bush for 6 days before stating that one of my references previous employment field was a red flag, which is just absurd. They wasted roughly 6-7 hours of my time. They expected 24/7 on-call. Stay away from this company. Super toxic HR.