I figure out why it does so:
Gerrit 2.10 has Kind of change uploaded:
Nontrivial content changes.
Conflict-free merge between the new parent and the prior patch set.
No code changed; same tree and same parent tree.
No changes; same commit message, same tree and same parent tree.
So, when we do some kind of trivial rebase (rebase some change in chain-changes after a patch set of some change in the chain was chanded) in Gerrit 2.11 we get kind:NO_CHANGE
Will you do update for Gerrit >2.10 ?