Adjudicators all come from somewhere and sometimes those past lives can intrude on the adjudication process. Parties who raise issues of conflict of interest based on a past role of an adjudicator usually frame that objection as an allegation of an apprehension of bias.
The test for reasonable apprehension of bias is well known. I have written about bias in the context of active adjudication previously. The legal test for a reasonable apprehension of bias is whether an informed person, viewing the matter realistically and practically and having thought the matter through, would think that it is more likely . . . [more]