multi-valued attribute suddenly become comma-separated

Hi,

Installed version:

OpenLDAP: slapd 2.3.30

My problem is that multi-valued attributes become single-valued attribtues with the values as comma separated list without any observable reason.

An entry should look like this (as it is entered into the directory): ... mail: testing1@test.com mail: testing2@test.com

After a while the entry suddenly looks like this: mail: testing1@test.com, testing2@test.com

Does anybody know, what the reason of this behaviour could be? I cannot find any cron-jobs modifying the ldap-directory, or any application with write-permission. The modification seems to happen accidentally.

Thanks in advance, Alex Bruckner