> Most likely your problem is with the Gerrit "Reviewers by Blame" plugin...
I suspect it will also be related to a recent change where every CL needs to be signed off by two google employees. Reducing the number of people who can +1 CLs is going to make it harder to get +1s on your CLs.
Reading between the lines I suspect some on the go team at google find it a frustrating situation where they have to rubber stamp contributions from trusted and capable contributors.