"System membership" status change messages in Defender logs

Here is what is in the log
UserXXX changed Membership2 Memberships "system-membership" status from publish to private; UserXXX published Membership2 Memberships "system-membership". There's a lot of these messages in Defender audit logs, a number of them every minute.

It's not causing any issues but is it an expected behavior or is it a sign of some "hidden problems"?