Facet not being included in Jar

I create a facet "secondSrc" and everything seems fine. But when i do a gradle build i get a jar file that only has the classes from the main sourceset. And, here's my output

:clean
:compileJava
:compileGroovy UP-TO-DATE
:processResources UP-TO-DATE
:classes
:writeManifestProperties
:jar
:assemble
:compileTestJava UP-TO-DATE
:compileTestGroovy UP-TO-DATE
:processTestResources UP-TO-DATE
:testClasses UP-TO-DATE
:test UP-TO-DATE
:compileFunctionalTestJava UP-TO-DATE
:compileFunctionalTestGroovy UP-TO-DATE
:processFunctionalTestResources UP-TO-DATE
:functionalTestClasses UP-TO-DATE
:functionalTest UP-TO-DATE
:compileIntegTestJava UP-TO-DATE
:compileIntegTestGroovy UP-TO-DATE
:processIntegTestResources UP-TO-DATE
:integTestClasses UP-TO-DATE
:integrationTest UP-TO-DATE
:check UP-TO-DATE
:compileSecondSrcJava
:compileSecondSrcGroovy UP-TO-DATE
:processSecondSrcResources UP-TO-DATE
:secondSrcClasses
:build

BUILD SUCCESSFUL

It appears the facet is being executed after the java stuff is executed. This is on gradle 3.0 and 3.1

Reproduce the reported build on Gradle 3.0 or 3.1 using a project with a secondSrc facet, then inspect the build output and resulting JAR. Trace why compileSecondSrcJava and secondSrcClasses run after jar; done means the JAR contains the facet's classes as well as the main source set.