Revenant's Vault Nightmare NO Epic Ethereal Shards

[fornax46]

After a couple of Revenant's Vault Nightmare solo runs (tank lv45) I don't get any Epic Ethereal Shards.
Is this problem known? and has someone the same problem?

[fornax46]

Finally I got my first, it just take an eternity.

After a couple of Revenant's Vault Nightmare solo runs (tank lv45) I don't get any Epic Ethereal Shards.
Is this problem known? and has someone the same problem?