Hi,
Thank you for the information - I used a hotfixed version but yours is without any hotfix. Regrettably, there was a bug in staging media files which was fixed right in the second hotfix. Please download the 4.1.21 hotfix package from our
hotfixes page, follow the included instructions and apply this hotfix in order to fix this issue.
I am sorry for this inconvenience.
Best regards,
Juraj Ondrus