My team wanted the ability to have bugs reported within a story so as not to have new bugs end up in the backlog when they're created. So I created another subtask issue type in the project that carries the Bug icon. This allows them to add bugs to a story similar to how they add subtasks to a story.
I am trying to associate a custom field to this new issuetype and cannot do it. The original subtask has the custom field but this new issue type doesn't despite being attached to the same screen scheme as the subtask.