ldapsearch returns little or nothing on first run

We use the ldap plugin to sync users and roles between AD and Appian.  We are seeing an issue that started only recently with the ldapsearch rule.  Occasionally the search will return null or 1.  When we rerun the exact same rule it returns all the users that we expect.  Currently to mitigate the production issue we're having the admins manually run our LDAP sync process.  The AD group does have 1525 users in it and has never been an issue before.  We're using version 1.2.2 of the LDAP Tools.