This image shows multiple attempts by now mod to leave. They go through the are you sure prompts and say yes but remain as a mod. Modlog image shows an unassociated user from a different instance is removed instead. That same user is removed when a different local mod tries to leave as mod. An admin from another instance reports they see removal of person_id 92 as well when their local tries to leave as mod.
If I check the request it shows person_id 92. {"community_id":3,"person_id":92,"added":false,"auth":"ey..."}
If I lookup person.id 92 in my db it shows the user referenced in the image, not my local user who was trying to leave as mod.
92 | sunspider | Sun-Spider