[Question]: Authentication without PKCE - invalid query parameters

[andrush001]

What Version of the library are you using?
19.0.0

Question
If I configure disablePkce to true I end up un URL: .../oauth2/authorize?client_id=...&redirect_uri=http%3A%2F%2Flocalhost%3A4200&response_type=code&scope=openid&nonce=c7e0cc46747e9bf7a3e9b44379607aa016BwynIwC&state=3293035c5b0573db792bf437922be409f5lwlwI9g&code_challenge=&code_challenge_method=S256&external=true

My authentication server throws error that code_challenge parameter is invalid. It is indeed invalid, it is empty. I think code_challenge and code_challenge_method parameter should not be part of the authorization request in case I want to authenticate without PKCE. Am I right?