mikro-orm: OneToOne is not cascaded correctly

Describe the bug If you create a new object with a OneToOne relation and persist that object, the items are persisted but the relation id’s are still empty.

For example:

const newEnt1 = wrap(new Enitity1()).assign({
        prop1: req.body.prop1,
        ent2: {
                prop: req.body.prop,
        }
});

This creates a row for ent2 in the database but it doesn’t fill the foreign keys (ent2.ent1_id is NULL) (doesn’t work if ent1 is owner of the relation nor if ent2 is. I expected something like the collections, that it fills the id’s as well.

Am I doing something wrong or is this not supported?