Storage facet cleanup removes images from repository without cleanup policy

Hi all,
I have a question for Nexus OSS 3.25.1-04. I have a docker hosted repository which has no cleanup policy. I have identified several times that images are disappearing. According to logs from webhooks, image are removed by initiator *TASK


which is basically matched to this log event:

2020-10-16 22:00:00,006+0200 INFO [quartz-11-thread-19] *SYSTEM - Task 'Storage facet cleanup' [] state change RUNNING -> WAITING (OK)

How is possible that Nexus removes any image by its own ? Do you have such experiences or any hint ? thanks