Interfolio Front End Engineer interview questions

Preliminary interview went great. So great that talent acquisition told me they would send me the head of engineering’s schedule by end of day so I could schedule a follow up interview. After not hearing anything for a week, I reached out to TA and they said they were out sick, but would send me the calendar by end of day. That was 3 weeks ago. Not sure what happened between then and now, but if TA says they are going to email you by end of day 2x, and then don’t, that’s a red flag. Which is disappointing because Interfolio seems like a great company.