SCIM validator fails "Filter for an existing user with a different case" on case sensitive "externalId"

According to SCIM RFC 7643 - Scim Core Schema - Section 3.1 - Common Attributes, the attribute externalId is described as case exact:

This attribute has "caseExact" as "true" and a mutability of "readWrite".

However the SCIM Validator tries to filter on this attribute with different case and fails.

I think it's related to "joining property" of the validator's attribute mapping, because when I select case insensitive userName, it passes the test. Shouldn't validator skip this case sensitivity test when externalId is selected?

Correlation ID: 9dce04e8-24fb-4e6d-b3b8-2dde187d3010
Timestamp (UTC): 2025-10-09T16:00:55.335Z

Ignore the PATCH errors, that's not implemented yet.