They get guest editors for a special issue. All the papers have been posted on the journal's website. At this stage, can the editors ask (some of) the authors to revise their papers -- without consulting the guest editors? Can they then insert in the print edition a note that undermines the credibility of the papers, their authors, and the guest editors?
All these curious events have led some philosophers to urge their colleagues to boycott Synthese, the journal in question.
Here are some links: