Epic Destiny XP is being returned
The rare bug where epic destiny experience is being lost after reincarnation is finally being officially addressed.
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.