If you create a process in some package

The actual package value is not filled in properly by Web Designer

There are some services which depends on the correct package value, such as
https://github.com/droolsjbpm/droolsjbpm-integration/blob/master/kie-server-parent/kie-server-services/kie-server-services-jbpm-ui/src/main/java/org/kie/server/services/jbpm/ui/ImageServiceBase.java#L65

that's why this is an important urgent bug.