Docker DB Corrupting When Restart Server

I am running Docker 1.13.0-rc4-beta34.1 and am having some issues with my Oracle XE DB.

Basically, once I have set the DB up it is fine. I basically use it to host/manage a SOLR index. The problem lies within my restarting my server, as this seems to corrupt the SOLR index, and I have to reindex all my files, which takes an hour…

Any ideas on what could be causing this?