The 4.3.1.Final release was staged:

https://repository.jboss.org/nexus/content/repositories/jboss_releases_staging_profile-042/

The release was not just re-tag as originally planned,

we had to address two serious issues:

  https://issues.jboss.org/browse/RF-12821

  https://issues.jboss.org/browse/RF-12824

~ Lukas