/libraries returns wrong data for some libraries

Details

Description

The filename and latest (not sure if any other) fields return incorrect values via /libraries endpoint for some libraries, while correct data is returned via /libraries/:library endpoint.

Steps to reproduce

Data for a library "caf" as returned by https://api.cdnjs.com/libraries?fields=name,latest,version,filename:

{
    "name": "caf",
    "latest": "https://cdnjs.cloudflare.com/ajax/libs/caf/13.1.1/caf.js",
    "version": "13.1.1",
    "filename": "caf.js"
},

Data for the same library as returned by https://api.cdnjs.com/libraries/caf?fields=name,latest,version,filename:

{
    "name": "caf",
    "latest": "https://cdnjs.cloudflare.com/ajax/libs/caf/13.1.1/umd/caf.js",
    "version": "13.1.1",
    "filename": "umd/caf.js"
}

Expected behavior

/libraries should return the same data as /libraries/:library

Logs

N/A

Start by comparing the /libraries and /libraries/:library endpoint implementations, focusing on how filename and latest are derived for the caf example. Reproduce both requests and verify that the collection endpoint returns the same values as the single-library endpoint for affected libraries.