Stop Windows Backup from making Deduplication Exclusion for backup drive

Question

With Windows Server Backup after every backup, the server puts an exclusion in the Deduplication list for the backup folder. Is there a way to stop this behavior?

If not, is there a way to get Powershell to remove the exclusion?

Edit: The Powershell command is;

Set-DedupVolume -Volume Y: -ExcludeFolder {}

I'd prefer to prevent this behavior if possible.