I upgraded Keycloack to 25.0.6 right now (don`t remember previous version, but not old).
And get broke my integration with other services with strange behavior - login attempt try to use http instead of httpS. I check .well-known/openid-configuration route—all urls now start with http.
To solve this issue, I use “Frontend URL” setting for my realm with httpS and all works perfect.
May be it can be useful.
PS. At my setup https connection supported by CaddyV2, maybe it case wrong urls by default for Keycloack.