Can't roll up date from epic to initiative

[Lucile Cornet]

Hi there,

I'm very new at using Jira admin so many thanks in advance for your precious help :) 

My company use Jira Software 9.5

Our issues hierarchy is the following : theme > initiative > epic > story

I'm currently trying some new things in the Advanced Roadmap. I've tried to set up the roll-up functionality, which works very well from story to epic and from initiative to theme.

However, it doesn't seeem to be working from epic to initiative. I can see clearly that the duration bar is not striped at the initiative level, whereas it is for the two other situations (from story to epic, and from initiative to theme).

The parent links are correctly used between the four levels of the hierarchy, and from my understanding : roll up functionality can be set up only for a plan, not for a specific issue type. So I don't really know what's happening here .. does any one has any idea ?

Kind regards,

Lucile