create a, an instance of A and associate b to a. Now save a
display b and delete it
display a
--> in the hasMany field "Loading..." is displayed (as b is not available anymore)
--> if "Loading..." is removed by clicking on the X, it still appears in the available instances of B
Maybe the same happens for hasOne, I did not check.
Assume schema A has many instances of schema B.
Maybe the same happens for hasOne, I did not check.