Insert does not call resetCache nor mark that cache is not complete

Have an issue where a feature with two entity boxes types exported to it, the permission for the second entity box type doesn't get set on enable. Tracked it down to the entity load only returning the first entity box type (and one other pre-existing one), and not the second one from the module.

It looks like cache is never reset on insert, and so $this->cacheComplete is never set to FALSE so it thinks the cache is complete, whereas it is not anymore.