At ODP, I see sometimes author A and B working together (co-publishing) and in a subsequent article of author B, one reviewer is the author A, or an article will be published by A and has been reviewed by author B.

This can bother me, in the sense that people may have doubts about the objectivity of the reviews, even if they are made public.

Is that OK with you ? And is it the kind of thing that may happen in other journals ?