Did you resolve this issue?
I have the same problem in my environment.
No, I have not had any response on this issue.
I accomplished this by mounting file system directory to the directory in my web application running the following command:
sudo mount -o bind /home/uploadedfiles $JBOSS_HOME/standalone/deployments/myapp.war/uploadedfiles
Have a look at https://community.jboss.org/thread/203669?tstart=0