Calibre-Web strips metadata on upload on epubs

[AIndoria]

Calibre-web for some reason removes the embedded metadata from the epub file upon upload. The Steps are easy to reproduce.

Upload an .epub with metadata embedded, and a lot of the fields would be empty.

Load the same .epub to calibre client (Windows 64 for example), and you can see all the embedded metadata in the file that ideally should also exist in the calibre-web.

1. This is what happens when you directly upload into Calibre-Web

2. This is what happens when you upload into Calibre client.

3. And this is what you see when you see the book in Calibre-Web AFTER adding it through Calibre client

No 3 is the expected behavior.