When browsing a revision, providing the wrong optional parameters, results in a 404 even though the main url is correct (without parameters).
Example:
renders a 404 not found because the origin_url is wrong.
It should have been https://archive.softwareheritage.org/browse/revision/a27a59f6b14c9fb13a6f998d8316628dafc1f60c/?origin_type=deposit&origin_url=https%3A//hal.archives-ouvertes.fr/hal-01727745
Still, being more concilient in that kind of error would be more user-friendly.
Probably proposing something along the line of we did not find exactly that, maybe you meant that?