For some reason, I was always under the impression that people that are included in the acknowledgement section of paper are not contacted to review your paper because they would be predisposed to give a favourable review. However, after reading the discussion in this question it seems like it is standard to send papers out for review to people in the acknowledgements section if there is not another conflict in place (like being from the same institution, for example). Which is it?
Do editors send a paper out for review to people in the acknowledgements section? Can I suggest a person I acknowledge for helpful comments as a potential reviewer (assuming there aren't other conflicts of interest)? If the field matters then I am interested primarily in mathematics, theoretical computer science, and biology.