Thanks a ton for a great advice. I appreciate it.
1. That's my doubt too. (I mean it could be a false alarm) One good quality my manager has is that, he doesn't do micromanagement. Trusts the employees. (I think work from home also adds to the confusion. Had there been some in person interactions, I could have interpreted better)
2. Having said that, I strongly suspect he is deliberately ignoring me. With due respect, he is a very mediocre manager.( in terms of technical knowledge etc.). Only silver lining for me is that, my 2nd line manager ( his boss) is technically very good and he rates me very high. He still talks to me.