DAM category with slash throws errors

Problem/Motivation

We have a category in our DAM called "IF/THEN Collection" and since it has been created we see errors for requests to /acquia-dam/categories?category=IF%2FTHEN%20Collection while browsing the DAM in our site's media library that look like:

Client error: `GET
https://api.widencollective.com/v2/categories/IF/THEN%20Collection` resulted
in a `401 Unauthorized` response:
{
"error": true,
"response_code": 401,
"error_message": "Unauthorized",
"stack_trace": null
}

All the other categories are working fine, so I suspect the handling of the slash in the category name is the culprit. Quoting Widen API documentation:

“Slashes in category names must be escaped with a preceeding backslash (%5C%2F).”