[Mailman-Users] Daily "pending moderator requests" despite empty moderation queue

Dear all,

for some lists, the listowners in the last few days keep getting "pending moderator requests" emails every day, even though there are no pending requests.

What mechanism generates these requests and how can I get rid of those redundant mails? (short of migrating to mailman 3 which I plan on doing)

Cheers, thanks a lot in advance,

Johannes