Hercules Class Titan aether costume makes staff invisible

[Zakur]

I'm using the Hercules Class Titan aether costume, and it appears to wield certain weapons (such as the Nemesis Staff and the Ghost Slaying Axe) just fine. However, when using a staff from the Staff Fighting secondary for Tankers, a weapon doesn't appear when readied or during the actual attack:

 

This bug is consistent with both the Carnival of War staff and the default Bladed staff, and using the sheathed version appears to have the same result. I haven't been able to test if this bug happens with every staff, but I am unaware of any staff that does work with this costume.