Bound loot from HOF cannot be stored in the bank.

Totes-Bode · June 2017

Simply put, attempting to store Bound armor and weapons from Halls of Fabrication returns this message: "Item cannot be stored in bank." I have 250 free spaces in my bank.

Shimmer · June 2017

You might have to wait until the trade able with other people in the dungeon timer wears off to store it.

Ilsabet · June 2017

Sylance9 wrote: »

You might have to wait until the trade able with other people in the dungeon timer wears off to store it.

That's not the case with gear from other trials. Sounds like something funky is going on with the new stuff.