Dalaran Defender Gear Bug?

[Mirasol-mannoroth (Mirasol)]

Yes, that is a bug they know about and are investigating.

Warbound items now SOULbound - Dalaran Defender

I’m not going to move this one to bugs because there are already a few threads on this going over there. This has been reported up - and is being looked into.

Edit to add a Support article they just released

https://us.battle.net/support/en/article/000364025