Custom entities made with add entity cannot be referenced with selectors

Repro steps:

1. Create a custom entity using add entity features
2. Type the command /kill @e[type=(custom entity name)]

Observed Results:

The custom entity, in this case, blockception:test will not autocomplete or become selected. However, when summoning normally using the /summon command they are able to be spawned into the game.

Expected Results:

The name of your custom entities should populate the screen and work