LDAP filter issues

[CyPech]

Hello,
Since migrating from 2.8 to 4.x (try 4.0 and 4.3 lastest), I've been having an LDAP authentication issue. I don't use the UID as the user ID; instead, I use the email address and filters.
When I modify the LDAP configuration via the web interface, the configuration file contains additional lines without deleting the original configuration. If my LDAP server or bind settings are incorrect, I cannot even connect via the database.
I ran some tests by adding debug points (DEBUG LOG) to the code in Ldap2Wrapper.php and Ldap.php within the plugin, and I noticed there’s an issue with the PopulateUser method in the filters. This suggests that the filters aren’t working as they used to, but I haven’t been able to pinpoint exactly where in the filters the problem lies.
I tried using another AD-style LDAP directory, even though there’s an existing plugin for testing purposes, but I got the same result.
Do you have any ideas?
Thanks