PPT file icons not showing in MyQNAPcloud, how to fix?

The PPT file icon in MyQNAPcloud does not display, but Word files from the same Office suite do show up.
I have already enabled file thumbnail display in FileStation6, and after enabling it, Word files display their icon thumbnails correctly,
but PPT files do not. Is this a bug? How can I resolve it?

Thank you!

Hi @Momo-Huang,

Thank you very much for your feedback. This issue has been resolved. Thumbnails for files can now be displayed normally.

If you encounter any other issues while using the service, please feel free to report them to our team at any time.

Thank you.