Backup retention still not working. Any update or fix?

Hello. Backup retention is not working for me.

Theres a lot of posts related with this problem, is not fixed yet?

A solution is to make an script that erases old backups but, how to deal with incremental backups? Theres an initial backup? How to update initial backup to get sync with the new incremental backups made after?

Until this is resolved, the retention of incremental backups overflows space on any server. Please any fix? Thanks.