Delta Electronics Field Applications Engineer interview questions

I got a HR interview after I submitted my application in 2 weeks for this position at the Industrial Automation Business Group. After that, proceeded to the interview with Product Manager in another 2 weeks.

Contacted by a Sr. Manager through personal referral - he provided basic information about the position but did not have many details about the location and timing, he also told me it would be really stressful. He contacted the other person who's doing the hiring. He called me and we spoke about one hour on the phone. He tone was very condescending towards my academic performance and how much revenue his department makes compare to my company, but nothing regarding the job function of the position and my past experience. He said he will follow up with me and fly me in for on-site interview but he never did and I heard nothing from them.