A subtask always belongs to its parent, and that parent can have an Epic, which then implies that the sub-task is inside that Epic. But there's an oversight in that the subtasks don't actually inherit the information internally. There are open issues which Atlassian have accepted to get this design flaw fixed.
There's two parts to this. It's absolutely correct that a sub-task should not be assigned to an Epic. A sub-task belongs to a parent, and hence belong to an Epic via that. It's absolutely a howling bug or flaw in JIRA that sub-tasks do not behave as though they belong to the same Epic as their parent. Yes, a few times I've scripted a field that
1 answer. If you go on the project settings and look at the screens associated with the issue type you are referring to, check that on the 'edit' screen the epic link field is there, then you should be allowed to change it from the view screen. I already have the input to change the epic link but the tooltip does not autocomplete with existinguwLC0dr.