User entity reference filter configuration broken

Reproduce steps:
- for an entity create a user entity reference field
- create a custom role
- configure the selection based on roles, selecting the custom role created above
- create a few users with names starting with the same letter and not all having the custom role created above
- try out i.e. the autocomplete - it will list all users starting with given letter, not only those having the role configured in the selection settings.