You can read the forum post here but the general idea of it is that if in the future you reincarnate and you lose your epic destiny experience submit a ticket and eventually it will be fixed. If you lost it in the past, submit a ticket and it will eventually be fixed as well.
In either case your help ticket might go into a “researching” queue while the GMs look into it.
I’m glad they have an official way of dealing with this. I’m sure many people are tired of the “this is a known issue” message with the closing of the ticket.