They told me they can wait for my notice to end and proceeded with a resume based AI interview, which went good. But later told me that they cant wait for my notice period to end and immediate joiner in the next 2 weeks

I was called by the HR to take an AI interview and then went through 1) A technical discussion round with the team lead. Asked me questions about Flutter and architecture of mobile apps, state management etc and 1 DSA sort of question on Dartpad 2) A technical discussion with the co founder , again generic questions around tech and a few basic programming and a DSA medium level question. 3)Last round with Founder, he again asked questions around tech and general CS fundamentals Overall all rounds went good, as also confirmed by HR but then they rejected my for IDK what reason after 4 rounds , which is a bit frustrating. And the HR was dodging the result, I had to message her multiple times to ask what the result was. Everyone was friendly and polite though