Database replication successful only at midnight

We have a database which replicate between 2 servers (different domain). It was working fine until about a month ago, the database only replicate between 23:00~00:30. We tried manual pull or push at daytime but it only shows replication start/stop with no document update.

We verified the ACL setting on both database copy and they are OK. The replication schedule is set to replicate every 180mins, 00:00~23:99, Mon~SUN at the connection document.

Is there any other setting could limited the time of the database replication?

Subject: database replication successful only at midnight

Do these databases have any replication formulas, based on time?

Subject: RE: database replication successful only at midnight

There was no formula setting on the database.