Versionable Item completely loses references

I have a post that has a reference to a subcategory

When i made my post versionable="full", the current and old versions of post lost this reference.

So when i call $post->subcategory i get back a Generic ODM document instead of a Subcategory Document

I know that relationships are not versionable, but relationships should at least still exist.

The workaround is to get the parent path and make a JCR-SQL2 query to fetch the subcategory document.