i also suffer this problem. Retention Policy doesn´t seem to work, so a lot of restore points keep saved in our Backups Storage.
Several weeks ago, i finally get to remove manually old full synthetic and all his incremental points ... but i know it´s no good doing that manually ..
So, i also find this link with help about the problem: https://my.veeam.com/#/kb1990
... but i can´t believe i must re-configure all jobs because now Retention Policy it´s not working ...
Is there any new solution for this error? Can somebody help me with this?