When comparing the EAP installed from errata against the zip, I see many differences in jboss-seam.jar and jboss-seam-ui.jar inside of admin-console.war.

[dist-diff] server/default/deploy/admin-console.war/WEB-INF/lib/jboss-seam.jar!org/jboss/seam/mock/MockExternalContext.class
[dist-diff] server/default/deploy/admin-console.war/WEB-INF/lib/jboss-seam.jar!org/jboss/seam/Component$BijectedField.class
[dist-diff] server/default/deploy/admin-console.war/WEB-INF/lib/jboss-seam.jar!org/jboss/seam/navigation/Pages.class
[dist-diff] server/default/deploy/admin-console.war/WEB-INF/lib/jboss-seam.jar!org/jboss/seam/Component$2.class
[dist-diff] server/default/deploy/admin-console.war/WEB-INF/lib/jboss-seam.jar!org/jboss/seam/web/AuthenticationFilter$1.class
[dist-diff] server/default/deploy/admin-console.war/WEB-INF/lib/jboss-seam.jar!org/jboss/seam/Component$SetInitialValue.class
[dist-diff] server/default/deploy/admin-console.war/WEB-INF/lib/jboss-seam.jar!org/jboss/seam/Component.class
[dist-diff] server/default/deploy/admin-console.war/WEB-INF/lib/jboss-seam.jar!org/jboss/seam/Component$BijectedProperty.class
[dist-diff] server/default/deploy/admin-console.war/WEB-INF/lib/jboss-seam.jar!org/jboss/seam/web/AuthenticationFilter.class
[dist-diff] server/default/deploy/admin-console.war/WEB-INF/lib/jboss-seam.jar!org/jboss/seam/navigation/Pages$1.class
[dist-diff] server/default/deploy/admin-console.war/WEB-INF/lib/jboss-seam.jar!org/jboss/seam/web/AuthenticationFilter$AuthType.class
[dist-diff] server/default/deploy/admin-console.war/WEB-INF/lib/jboss-seam.jar!org/jboss/seam/Component$ConstantInitialValue.class

And more...

I checked the manifests and there is a different JDK version:
Created-By: 1.6.0_20-b02 (Sun Microsystems Inc.) vs. Created-By: 17.0-b16 (Sun Microsystems Inc.)