When there are multiple content types with the same name, the object relations field type only shows one content type.

Steps to reproduce:

• Create content type "Article" with identifier "article_1"
• Create content type "Article" with identifier "article_2"
• Create content type "Selected articles" with identifier "selected_articles"
• Add content relations field type to the content type
• Observe the "Allowed content types" dropdown
• There is only one selection "Article"

I can only select one type of "Article", while there are infact two.I would expect to have two instances of "Article".