Fiendish Crown still gives bonus spells to Hexblades

[Wrips]

Description of Bug Experienced:
Even after the Hexblade has been migrated to Harbinger, along their appropriate items, Fiendish Crown still gives bonus spells to Hexblades. It's not a text only bug, as wearing the Crown with a Harbinger doesn't give you bonus spells.

Steps to reproduce the Bug:
Equip a Fiendish Crown

Expected Result:
You gain one bonus spell on slot 1, 2 and 3

Actual Result:
Nothing happens

Screenshot(s)

Additional Information/Notes

[Iceborn]

This is the current case for all bonus spells properties.
A fix is still in the works, but new crowns will spawn with the correct properties. After the update.