Getting a collection of packages - filters should validate values - mod-kb-ebsco

When I send a request to mod-kb-ebsco of the flavor below:

/eholdings/packages/?q=abc-clio&count=50&page=1&sort=notsupported&filter[selected]=something&filter[type]=all

Please note that in the query params above: sort and filter[selected] have unsupported values. We get a 200 with results instead of getting an error response because mod-kb is translating those filters that we support to RM API, else passing the default value of the filter to RM API, thus the validation of filter values is getting lost both at mod-kb level and RM API level.