I applied on their website. A recruiting coordinator emailed me to request my availability for a call with the hiring manager. I replied with some availability and didn't hear back for several days. I sent another message with additional availabilities. A couple days later, a calendar invite showed up, with zero explanation or information, for a one-hour Teams call with the HM. Then on the day of the interview, I received a cancellation notification, again with zero information or explanation. I even sent a follow-up email to the recruiting coordinator asking what happened, and never received a response.