Missing data from get all users in 2.3.2

We are experiencing an issue that appears to be related to the threading/pooling in versions after 2.0.1. We have 2 ldap sources (one is an ldap provider that holds 5000 users, the other is AD that holds 3000 users). We have a gui that allows the user to "browse" all users -- returning the user name followed by a count of memberOf: John A. Doe - (12). The text is created in the Controller where we loop through all the users returned from our query of each source. Something strange is happening. Intermittently, the ldap source returns all the user names with "(0)" accesses. Less frequently, the results from AD are outright missing blocks of users -- some are there, but not all. I could maybe see that the AD results could be from some sort of timeout, but the ldap results are very strange. Any ideas?

Start by reproducing the all-users query against both LDAP sources with versions 2.0.1 and 2.3.2, focusing on the Controller loop and the threading or pooling behavior described. Compare complete user blocks and memberOf counts across runs. Done means identifying the cause of missing users or zero counts and confirming consistent results from both sources.