Scaffold doesn't shows the correct referenced entities in edit views, while in details views shows something like "org.forgetest.model.Entity@5f9ba38e"

For a table with a foreign key the UI permits to select the possible values, but this values are listed in a dropdown menu in a form like "org.forgetest.model.Entity@5f9ba38e" (would be preferable that the string present be relative to the PK referenced)
Anyway, after setting this field and submitting the form, the data are inserted in the table correctly but when i want to modify the record, the UI doesn't show the setted value for the foreign key and i must set it again before saving.