Guys, I found it a bit bothering to ride with noise from chain, and I have a hard time identifying the issue. The noise is definitely related to the derailleur. It does not seem to be related to one specific chain link (if so I think the noise would be periodic, but I am not sure)
When I wind back the chain (when the bike is not moving forward), I did not observe jumping chain links.

Any suggestions? This is a new chain and I cleaned the cassette before putting the chain on. It was my first time replacing a chain and I am wondering if I did not tighten the rivet enough.