Entities with disambiguations do not show the disambiguation on the new relationship editor when they're used in relationships (such as "producer: Artist X"). This can be problematic:

Imagine you're trying to easily check if you have fixed all the links to Artist X which were originally for "Artist X (singer)" instead of "Artist X (producer)". Right now you can just search for the string "Artist X (producer)" and you'll immediately find any cases you haven't changed yet. Without the disambiguations you need to hover over every usage to check whether it's correct.