Hi Team,
We're using the classic jira project. In our epics we've two fields start date and due date.
Roadmap is using these two fields to represent. But when we updated these fields it's not reflected in the roadmap.
It's showing the bar line for old start and due date. 
Can you please let us know where we're missing to show the updated start and due dates in roadmap?
Let us know if you need any more info. Thank you in advance.
Regards,
Narendra