download filename is a number in stead of title+extension

[femans]

Describe the bug When downloading something, the filename becomes a number, rather than the title and the extension. Tried with a view epubs. E.g. https://ipfs-search.com/#/search/detail/text/bafykbzaceafp7c4jtgdexz2cxs5jroqqdoss7fsklo3tbnlryu2jttdttahsw?q=howl's+moving+castle&page=1&type=text&doc-type=ePub&last_seen=Any

To Reproduce

• Visit link above.
• click download button
• see the filename is a number

Expected behavior The filename should be - if possible - a descriptive name and at least have the correct extension (in the case above, an epub)