Issue Exclude Directory from Backup not working

[MarkusG]

Hello,

after Upgrading Plesk 17.5 to 17.8 excluding a directory from Backup stopped working.

The directory /downloads is inside the Webspace but outside httpdocs. I exclude the directory with

/downloads (worked with 17.5)

Whenever I start the backup the following error message appears immediately:

Error: The backup process failed: Not enough free disk space to backup selected objects. At least 1045061.71 MBytes free disk space is required.

Has something changed here?

Thanks and regards, Markus