Forgot Password - different response time for existing and non-existing users - possible vulnerability

Keycloak 23.0.7.
In the dialog Forgot Your Password? when I enter an existing user, the response time is 500-600 ms. When I enter a non-existent one, the response time is 50-60 ms. Accordingly, it is possible to find out a valid login name.
Is there anything I can configure to make it undetectable?