Ldap stuck on "Pending sync" state

Hi everyone,

I have Gitlab 12.1.2 ee version with Gitlab helm chart.
LDAP works fine with login and authentication and

gitlab-rake gitlab:ldap:check

runs without any error, but when I add “LDAP synchronizations” to the group and goes to the “Members” page and click on “Sync now”, it goes to the “Pending sync” and it remains in this state without any logs or errors.