DataCore Software Development Engineer In Test SDET interview questions

I got interviewed in the second week of Dec 2021. They told that there will two technical rounds, one with India head and one more with HR. I cleared all the rounds and during HR discussion they told that I am selected and they are expecting my confirmation. Suddenly after few days they setup one more technical round. I was not prepared for this as they had told that this is going to be a casual discussion. They rejected me in this round