In a project - in the roadmap, we want to to be able to set the dates in two ways (1) through GUI when in the roadmap view we can set the start date and end date (no issue here) or (2) When editing the EPIC issue by setting the specific fields start date and end date. I want to set this up for the Product Owner can enter the start date and end date directly into the ticket knowing it will then be shown on the roadmap GUI. Option 2 is where we have an issue. We have added the fields but they do not either (a) contain a date that does not match what is set in the GUI or (b) contain no information. We have experimented with every "date field" that is available to us in the Issue Screen (configure screen). Therefore I am assuming that I have not added the correct fields. I have searched and searched the internet and atlassian and see no information that says: When setting the start date in the roadmap GUI, you are seeing the date in this field.
There are no custom fields that are "end date". There is one custom field "Start date" which we have tested and it does not match the data in "start date" in the GUI.
Example - in my Jira instance I have field titled "end date". I have two fields with the similar names (1) Due Date and (2) Due date (lower case). Neither of these correlate to the "end date" on the roadmap.