FORM and OIDC authentication with two war applications packaged in an ear

Issue

• I am unable to use FORM authentication in one war and OIDC authentication in another war in the same ear.
• The OIDC authentication works, but the FORM authentication fails with:

TRACE [org.wildfly.security.http] (default task-2) Authentication failed.: org.wildfly.security.http.HttpAuthenticationException: ELY06017: HTTP authentication is required but no authentication mechansims are available.
    at org.wildfly.security.elytron-base@2.2.2.Final-redhat-00001//org.wildfly.security.http.HttpAuthenticator$AuthenticationExchange.authenticate(HttpAuthenticator.java:318)
    at org.wildfly.security.elytron-base@2.2.2.Final-redhat-00001//org.wildfly.security.http.HttpAuthenticator$AuthenticationExchange.access$800(HttpAuthenticator.java:296)
    at org.wildfly.security.elytron-base@2.2.2.Final-redhat-00001//org.wildfly.security.http.HttpAuthenticator.authenticate(HttpAuthenticator.java:93)
    at org.wildfly.security.elytron-web.undertow-server@4.0.0.Final-redhat-00001//org.wildfly.elytron.web.undertow.server.SecurityContextImpl.authenticate(SecurityContextImpl.java:107)
    at org.wildfly.security.elytron-web.undertow-server-servlet@4.0.0.Final-redhat-00001//org.wildfly.elytron.web.undertow.server.servlet.ServletSecurityContextImpl.authenticate(ServletSecurityContextImpl.java:117)
    at io.undertow.servlet@2.3.11.SP1-redhat-00001//io.undertow.servlet.handlers.security.ServletAuthenticationCallHandler.handleRequest(ServletAuthenticationCallHandler.java:55)
    at io.undertow.core@2.3.11.SP1-redhat-00001//io.undertow.server.handlers.DisableCacheHandler.handleRequest(DisableCacheHandler.java:33)
    at io.undertow.core@2.3.11.SP1-redhat-00001//io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
    at io.undertow.core@2.3.11.SP1-redhat-00001//io.undertow.security.handlers.AuthenticationConstraintHandler.handleRequest(AuthenticationConstraintHandler.java:53)
    at io.undertow.core@2.3.11.SP1-redhat-00001//io.undertow.security.handlers.AbstractConfidentialityHandler.handleRequest(AbstractConfidentialityHandler.java:46)
    at io.undertow.servlet@2.3.11.SP1-redhat-00001//io.undertow.servlet.handlers.security.ServletConfidentialityConstraintHandler.handleRequest(ServletConfidentialityConstraintHandler.java:64)
    at io.undertow.servlet@2.3.11.SP1-redhat-00001//io.undertow.servlet.handlers.security.ServletSecurityConstraintHandler.handleRequest(ServletSecurityConstraintHandler.java:60)
    at io.undertow.core@2.3.11.SP1-redhat-00001//io.undertow.security.handlers.AbstractSecurityContextAssociationHandler.handleRequest(AbstractSecurityContextAssociationHandler.java:43)
    at org.wildfly.security.elytron-web.undertow-server-servlet@4.0.0.Final-redhat-00001//org.wildfly.elytron.web.undertow.server.servlet.CleanUpHandler.handleRequest(CleanUpHandler.java:38)
    at io.undertow.core@2.3.11.SP1-redhat-00001//io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
    at org.wildfly.extension.undertow@8.0.0.GA-redhat-00011//org.wildfly.extension.undertow.security.jacc.JACCContextIdHandler.handleRequest(JACCContextIdHandler.java:61)
    at io.undertow.core@2.3.11.SP1-redhat-00001//io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
    at org.wildfly.extension.undertow@8.0.0.GA-redhat-00011//org.wildfly.extension.undertow.deployment.GlobalRequestControllerHandler.handleRequest(GlobalRequestControllerHandler.java:68)
    at io.undertow.servlet@2.3.11.SP1-redhat-00001//io.undertow.servlet.handlers.SendErrorPageHandler.handleRequest(SendErrorPageHandler.java:52)
    at io.undertow.core@2.3.11.SP1-redhat-00001//io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
    at io.undertow.servlet@2.3.11.SP1-redhat-00001//io.undertow.servlet.handlers.ServletInitialHandler.handleFirstRequest(ServletInitialHandler.java:276)
    ...

DEBUG [io.undertow.request.error-response] (default task-2) Setting error code 500 for exchange HttpServerExchange{ GET /form/secured}: java.lang.RuntimeException
    at io.undertow.core@2.3.11.SP1-redhat-00001//io.undertow.server.HttpServerExchange.setStatusCode(HttpServerExchange.java:1492)
    at org.wildfly.security.elytron-web.undertow-server@4.0.0.Final-redhat-00001//org.wildfly.elytron.web.undertow.server.SecurityContextImpl.authenticate(SecurityContextImpl.java:110)
    at org.wildfly.security.elytron-web.undertow-server-servlet@4.0.0.Final-redhat-00001//org.wildfly.elytron.web.undertow.server.servlet.ServletSecurityContextImpl.authenticate(ServletSecurityContextImpl.java:117)
    at io.undertow.servlet@2.3.11.SP1-redhat-00001//io.undertow.servlet.handlers.security.ServletAuthenticationCallHandler.handleRequest(ServletAuthenticationCallHandler.java:55)
    at io.undertow.core@2.3.11.SP1-redhat-00001//io.undertow.server.handlers.DisableCacheHandler.handleRequest(DisableCacheHandler.java:33)
    at io.undertow.core@2.3.11.SP1-redhat-00001//io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
    at io.undertow.core@2.3.11.SP1-redhat-00001//io.undertow.security.handlers.AuthenticationConstraintHandler.handleRequest(AuthenticationConstraintHandler.java:53)
    at io.undertow.core@2.3.11.SP1-redhat-00001//io.undertow.security.handlers.AbstractConfidentialityHandler.handleRequest(AbstractConfidentialityHandler.java:46)
    at io.undertow.servlet@2.3.11.SP1-redhat-00001//io.undertow.servlet.handlers.security.ServletConfidentialityConstraintHandler.handleRequest(ServletConfidentialityConstraintHandler.java:64)
    at io.undertow.servlet@2.3.11.SP1-redhat-00001//io.undertow.servlet.handlers.security.ServletSecurityConstraintHandler.handleRequest(ServletSecurityConstraintHandler.java:60)
    at io.undertow.core@2.3.11.SP1-redhat-00001//io.undertow.security.handlers.AbstractSecurityContextAssociationHandler.handleRequest(AbstractSecurityContextAssociationHandler.java:43)
    at org.wildfly.security.elytron-web.undertow-server-servlet@4.0.0.Final-redhat-00001//org.wildfly.elytron.web.undertow.server.servlet.CleanUpHandler.handleRequest(CleanUpHandler.java:38)
    at io.undertow.core@2.3.11.SP1-redhat-00001//io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
    at org.wildfly.extension.undertow@8.0.0.GA-redhat-00011//org.wildfly.extension.undertow.security.jacc.JACCContextIdHandler.handleRequest(JACCContextIdHandler.java:61)
    at io.undertow.core@2.3.11.SP1-redhat-00001//io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
    at org.wildfly.extension.undertow@8.0.0.GA-redhat-00011//org.wildfly.extension.undertow.deployment.GlobalRequestControllerHandler.handleRequest(GlobalRequestControllerHandler.java:68)
    at io.undertow.servlet@2.3.11.SP1-redhat-00001//io.undertow.servlet.handlers.SendErrorPageHandler.handleRequest(SendErrorPageHandler.java:52)
    at io.undertow.core@2.3.11.SP1-redhat-00001//io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
    at io.undertow.servlet@2.3.11.SP1-redhat-00001//io.undertow.servlet.handlers.ServletInitialHandler.handleFirstRequest(ServletInitialHandler.java:276)
    at io.undertow.servlet@2.3.11.SP1-redhat-00001//io.undertow.servlet.handlers.ServletInitialHandler$2.call(ServletInitialHandler.java:135)
    at io.undertow.servlet@2.3.11.SP1-redhat-00001//io.undertow.servlet.handlers.ServletInitialHandler$2.call(ServletInitialHandler.java:132)
    at io.undertow.servlet@2.3.11.SP1-redhat-00001//io.undertow.servlet.core.ServletRequestContextThreadSetupAction$1.call(ServletRequestContextThreadSetupAction.java:48)
    at io.undertow.servlet@2.3.11.SP1-redhat-00001//io.undertow.servlet.core.ContextClassLoaderSetupAction$1.call(ContextClassLoaderSetupAction.java:43)
    at org.wildfly.extension.undertow@8.0.0.GA-redhat-00011//org.wildfly.extension.undertow.deployment.UndertowDeploymentInfoService$UndertowThreadSetupAction.lambda$create$0(UndertowDeploymentInfoService.java:1430)
...