Stack Exchange network consists of 183 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers.
Pardon a question from someone in a different field: why didn't the reviewer turn down the invitation to review and say they had a conflict of interest when they saw the abstract? Was it not clear from the abstract that there was substantial overlap? Or is that not how invitations to review work in math?