Redirect not working - PRD only

Locally everything works fine.

But on PRD my Login process stucks when redirecting. The /oauth2/default works fine with a 302 but then my redirect /implicit/callback ist returning a 404.

curl ‘PROD-URL/implicit/callback’
-H ‘authority: PRD-URL’
-H ‘pragma: no-cache’
-H ‘cache-control: no-cache’
-H ‘upgrade-insecure-requests: 1’
-H ‘dnt: 1’
-H ‘user-agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_14_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/88.0.4324.96 Safari/537.36’
-H ‘accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,image/apng,/;q=0.8,application/signed-exchange;v=b3;q=0.9’
-H ‘sec-fetch-site: cross-site’
-H ‘sec-fetch-mode: navigate’
-H ‘sec-fetch-user: ?1’
-H ‘sec-fetch-dest: document’
-H ‘sec-ch-ua: “Chromium”;v=“88”, “Google Chrome”;v=“88”, “;Not A Brand”;v=“99”’
-H ‘sec-ch-ua-mobile: ?0’
-H ‘accept-language: en-GB,en;q=0.9,de-CH;q=0.8,de;q=0.7’
-H 'cookie: ln=XXXgmail.com; okta-oauth-redirect-params=:xxxopenidxxxclientIdxxxissuerhttps://xxx.okta.com/oauth2/defaultxxxauthorizeUrlxxxhttps://xxx.okta.com/oauth2/default/v1/authorizexxxuserinfoUrlhttps://xxx.com/oauth2/default/v1/userinfoxxxokenUrlxxxhttps://xxx.com/oauth2/default/v1/tokenxxxrevokeUrlxxxhttps://xxx.com/oauth2/default/v1/revokexxxlogoutUrlxxxhttps://xxx.okta.com/oauth2/default/v1/logoutxxxignoreSignaturexxxfalse}; okta-oauth-nonce=xxx; okta-oauth-state=xxx
–compressed

routing-module:
import { CommonModule } from ‘angular/common’;
import { NgModule } from ‘angular/core’;
import { Routes, RouterModule } from ‘angular/router’;
import { OktaAuthGuard, OktaCallbackComponent, OKTA_CONFIG, OktaAuthModule} from ‘okta/okta-angular’;
import { HTTP_INTERCEPTORS, HttpClientModule } from ‘angular/common/http’;
import { AuthInterceptor } from ‘./shared/okta/auth.interceptor’;
import { HomeComponent } from ‘./home/home.component’;
import { OverviewComponent } from “./overview/overview.component”;
import { MaterialModule } from “./material.module”;
import { environment } from “…/environments/environment”;

const oktaConfig = {
issuer: ‘xxx/oauth2/default’,
redirectUri: environment.redirectUri + ‘/implicit/callback’,
clientId: ‘xxx’,
scopes: [‘openid’, ‘profile’],
pkce: true
};

const routes: Routes = [
{ path: ‘’, redirectTo: ‘/home’, pathMatch: ‘full’ },
{
path: ‘home’,
component: HomeComponent,
},
{
path: ‘implicit/callback’,
component: OktaCallbackComponent
},
{
path: ‘overview’,
component: OverviewComponent,
canActivate: [OktaAuthGuard]
},

NgModule({
declarations: [
HomeComponent
],
imports: [
CommonModule,
OktaAuthModule,
RouterModule.forRoot(routes),
MaterialModule
],
providers: [
{ provide: OKTA_CONFIG, useValue: oktaConfig },
{ provide: HTTP_INTERCEPTORS, useClass: AuthInterceptor, multi: true }
],
exports: [RouterModule]
})

ANY ideas whats wrong?