I was unable to work out why a roadmap looked wrong. Filters on a roadmap do not display the entity that is being filtered on. So when a field is on multiple entities (eg. epic and initiative), you don't know whether its filtering epics or initiatives.
User confusion on why something isn't working (I had to ask a colleague to debug a roadmap for me).
To check a filter you need to delete it and re-add it, as there's no way to know.
In the full filter view show entity being filtered on, so users can see this.
At a minimum add a hover state (not preferred due to accessibility).