Strange issue when disabling cloudflare

[landorg]

Hi.
We are experiencing a strange issue with this plugin. As long as we have enabled cloudflare proxy & load-balancers things are working fine.
As soon as we disable it we cannot login anymore. We are getting a timeout from keycloak:

2022/06/21 09:46:05 [error] 1372#0: *1305092 [lua] openidc.lua:529: call_token_endpoint(): accessing token endpoint (https://auth-playground4.example.com/auth/realms/example/protocol/openid-connect/token) failed: timeout, client: 78.47.233.153, server: kong, request: "GET /cb?state=c640ddeba2f46fd1e50367c4989bbaed&session_state=1b37cad0-66c6-4336-b795-c2635eb4b5f5&code=1a3d69ef-708f-4d62-9596-7f98e0b4d4b1.1b37cad0-66c6-4336-b795-c2635eb4b5f5.417b7905-3b29-4d93-96fd-4cedfd11bdca HTTP/2.0", host: "app-playground4.example.com"

keycloak output doesn't really tell me a lot.

Any idea what might be causing this?

keycloak log:

[0m13:37:43,077 TRACE [org.keycloak.events] (default task-3) type=CLIENT_LOGIN, realmId=example, clientId=example, userId=8e8a476e-a0d0-4865-b270-e166070a8af5, ipAddress=10.42.0.106, token_id=39982fb1-e649-4eb1-ac63-0dee6c6656a4, grant_type=client_credentials, scope='profile email', client_auth_method=client-secret, username=service-account-example, authSessionParentId=95651253-a04f-457c-a737-d9863c9fe4ec, authSessionTabId=-AjWZ1F1LVM, requestUri=https://auth-playground.example.com/auth/realms/example/protocol/openid-connect/token, stackTrace=
    [email protected]//org.keycloak.events.log.JBossLoggingEventListenerProvider.logEvent(JBossLoggingEventListenerProvider.java:114)
    [email protected]//org.keycloak.events.EventListenerTransaction.commitImpl(EventListenerTransaction.java:62)
    [email protected]//org.keycloak.models.AbstractKeycloakTransaction.commit(AbstractKeycloakTransaction.java:48)
    [email protected]//org.keycloak.services.DefaultKeycloakTransactionManager.commit(DefaultKeycloakTransactionManager.java:146)
    [email protected]//org.keycloak.services.filters.AbstractRequestFilter.close(AbstractRequestFilter.java:64)
    [email protected]//org.keycloak.services.filters.AbstractRequestFilter.filter(AbstractRequestFilter.java:49)
    [email protected]//org.keycloak.provider.wildfly.WildFlyRequestFilter.doFilter(WildFlyRequestFilter.java:39)
    [email protected]//io.undertow.servlet.core.ManagedFilter.doFilter(ManagedFilter.java:61)
    [email protected]//io.undertow.servlet.handlers.FilterHandler$FilterChainImpl.doFilter(FilterHandler.java:131)
    [email protected]//io.undertow.servlet.handlers.FilterHandler.handleRequest(FilterHandler.java:84)
    [email protected]//io.undertow.servlet.handlers.security.ServletSecurityRoleHandler.handleRequest(ServletSecurityRoleHandler.java:62)
    [email protected]//io.undertow.servlet.handlers.ServletChain$1.handleRequest(ServletChain.java:68)
    [email protected]//io.undertow.servlet.handlers.ServletDispatchingHandler.handleRequest(ServletDispatchingHandler.java:36)
    [email protected]//org.wildfly.extension.undertow.security.SecurityContextAssociationHandler.handleRequest(SecurityContextAssociationHandler.java:78)
    [email protected]//io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
    [email protected]//io.undertow.servlet.handlers.RedirectDirHandler.handleRequest(RedirectDirHandler.java:68)
    [email protected]//io.undertow.servlet.handlers.security.SSLInformationAssociationHandler.handleRequest(SSLInformationAssociationHandler.java:117)
    [email protected]//io.undertow.servlet.handlers.security.ServletAuthenticationCallHandler.handleRequest(ServletAuthenticationCallHandler.java:57)
    [email protected]//io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
    [email protected]//io.undertow.security.handlers.AbstractConfidentialityHandler.handleRequest(AbstractConfidentialityHandler.java:46)
    [email protected]//io.undertow.servlet.handlers.security.ServletConfidentialityConstraintHandler.handleRequest(ServletConfidentialityConstraintHandler.java:64)
    [email protected]//io.undertow.security.handlers.AuthenticationMechanismsHandler.handleRequest(AuthenticationMechanismsHandler.java:60)
    [email protected]//io.undertow.servlet.handlers.security.CachedAuthenticatedSessionHandler.handleRequest(CachedAuthenticatedSessionHandler.java:77)
    [email protected]//io.undertow.security.handlers.NotificationReceiverHandler.handleRequest(NotificationReceiverHandler.java:50)
    [email protected]//io.undertow.security.handlers.AbstractSecurityContextAssociationHandler.handleRequest(AbstractSecurityContextAssociationHandler.java:43)
    [email protected]//io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
    [email protected]//org.wildfly.extension.undertow.security.jacc.JACCContextIdHandler.handleRequest(JACCContextIdHandler.java:61)
    [email protected]//io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
    [email protected]//org.wildfly.extension.undertow.deployment.GlobalRequestControllerHandler.handleRequest(GlobalRequestControllerHandler.java:68)
    [email protected]//io.undertow.servlet.handlers.SendErrorPageHandler.handleRequest(SendErrorPageHandler.java:52)
    [email protected]//io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
    [email protected]//io.undertow.servlet.handlers.ServletInitialHandler.handleFirstRequest(ServletInitialHandler.java:269)
    [email protected]//io.undertow.servlet.handlers.ServletInitialHandler.access$100(ServletInitialHandler.java:78)
    [email protected]//io.undertow.servlet.handlers.ServletInitialHandler$2.call(ServletInitialHandler.java:133)
    [email protected]//io.undertow.servlet.handlers.ServletInitialHandler$2.call(ServletInitialHandler.java:130)
    [email protected]//io.undertow.servlet.core.ServletRequestContextThreadSetupAction$1.call(ServletRequestContextThreadSetupAction.java:48)
    [email protected]//io.undertow.servlet.core.ContextClassLoaderSetupAction$1.call(ContextClassLoaderSetupAction.java:43)
    [email protected]//org.wildfly.extension.undertow.security.SecurityContextThreadSetupAction.lambda$create$0(SecurityContextThreadSetupAction.java:105)
    [email protected]//org.wildfly.extension.undertow.deployment.UndertowDeploymentInfoService$UndertowThreadSetupAction.lambda$create$0(UndertowDeploymentInfoService.java:1530)
    [email protected]//org.wildfly.extension.undertow.deployment.UndertowDeploymentInfoService$UndertowThreadSetupAction.lambda$create$0(UndertowDeploymentInfoService.java:1530)
    [email protected]//org.wildfly.extension.undertow.deployment.UndertowDeploymentInfoService$UndertowThreadSetupAction.lambda$create$0(UndertowDeploymentInfoService.java:1530)
    [email protected]//org.wildfly.extension.undertow.deployment.UndertowDeploymentInfoService$UndertowThreadSetupAction.lambda$create$0(UndertowDeploymentInfoService.java:1530)
    [email protected]//io.undertow.servlet.handlers.ServletInitialHandler.dispatchRequest(ServletInitialHandler.java:249)
    [email protected]//io.undertow.servlet.handlers.ServletInitialHandler.access$000(ServletInitialHandler.java:78)
    [email protected]//io.undertow.servlet.handlers.ServletInitialHandler$1.handleRequest(ServletInitialHandler.java:99)
    [email protected]//io.undertow.server.Connectors.executeRootHandler(Connectors.java:387)
    [email protected]//io.undertow.server.HttpServerExchange$1.run(HttpServerExchange.java:841)
    [email protected]//org.jboss.threads.ContextClassLoaderSavingRunnable.run(ContextClassLoaderSavingRunnable.java:35)
    [email protected]//org.jboss.threads.EnhancedQueueExecutor.safeRun(EnhancedQueueExecutor.java:1990)
    [email protected]//org.jboss.threads.EnhancedQueueExecutor$ThreadBody.doRunTask(EnhancedQueueExecutor.java:1486)
    [email protected]//org.jboss.threads.EnhancedQueueExecutor$ThreadBody.run(EnhancedQueueExecutor.java:1377)
    [email protected]//org.xnio.XnioWorker$WorkerThreadFactory$1$1.run(XnioWorker.java:1280)