Maven 3.8.4 exits with non-zero status from release:perform or :prepare even when successful

When doing a "release:prepare" or "release:perform", the maven process always exits with a shell exit status of 1, even when the goal has finished with a "BUILD SUCCESS" message, where it actually should return 0.

This doesn't seem to have been the case with 2.x versions of the plugin.

This is an important bug since it messes up using maven and the release plugin in shell scripts.