It looks like something changed in iOS 12, as this works on iOS 11.4. You can work around this by choosing "Copy to Dropbox" (in the first row of the share sheet -- scroll to the right of Add to Notes, etc), which preserves the file name.
Hi Jay!
On Safari on the iPhone, for example, I click on a .torrent file to save it to my dropbox (my torrent client on my PC monitors this folder and downloads whatever I save there). So I click on the torrent link and it gives me a "Open in..." prompt. I click on "More" and there's a "Save to Dropbox" option.
Clicking this option asks me for the location and the name of the file, but the name used to be inherited from the original filename. Now it uses a "File day-month-year hour minte second" format, as per the attached screenshots.
Appending .torrent to the filename works, and the file is processed normally. This behavior changed a few months ago (from inheriting the filename normally), but I only posted now about it. The behavior is the same using Chrome.
This same behavior has been seen before according to this post, with the difference that the extension is not maintained
https://www.dropboxforum.com/t5/Mobile/iOS-11-PDF-Export-to-Dropbox-changing-names/td-p/243461
Hi David,
Yes, "Copy do Dropbox" works and preserves the filename. I'll stick to it for now, but that's something that should be fixed again. Thank you.
I've filed a bug to track this internally. Thanks for the report!