Despite being a mature framework, Drools is not immune to bugs of course. When a bug is found, the best thing we can do as a Drools' user is report it. Drools' issues are tracked in the following web application: https://issues.jboss.org/projects/DROOLS

Before reporting an issue, we should always do some research and check whether the issue is not already reported. If we are dealing with an unreported issue, the best way to make it attractive to the Drools' team—and probably increasing the chances to be resolved—is to provide a complete description of the problem along with a self-contained Maven project, exposing the issue in one or more unit tests. Self-contained tests can also be submitted via pull-requests to the Drools GitHub repository at https://github.com/droolsjbpm/drools.

Once the issue is created, we can keep a track of it either in the issue tracker application or by joining the #drools channel on www.freenode.net IRC and politely asking the team if they have any update.