web-fragment.xml not loaded from a static module

Having a custom static module, e.g. org/jboss/solder which contains solder.jar with META-INF/web-fragment.xml with some filters defined (e.g. CatchExceptionFilter)

and a WAR application, e.g. catch-basic-servlet (on of Solder examples) with jboss-deployment-structure.xml such as

<jboss-deployment-structure xmlns="urn:jboss:deployment-structure:1.2">
    <deployment>
        <dependencies>
            <module name="org.jboss.solder" meta-inf="import"/>
        </dependencies>
    </deployment>
</jboss-deployment-structure>

The filters defined in the solder's web-fragment.xml don't seem to work, while the same app works fine if the solder.jar is deployed in the WAR in the WEB-INF/lib instead of a static module.

People seem to assume that whatever works for WEB-INF/lib would also work for a static module. This assumption should either be fulfilled or clearly explained to people if it doesn't hold.