elixir.ext.versioned and multi-table inheritance do not work together as expected

[guest]

When using multi-table (join) inheritance and both parent and child classes are versioned, only the child is actually versioned, even if fields from the base class are changed.

To reproduce: run the attached script and then take a look at the database (or SA output on the console) and see that only page_history is updated, but content_history is not.