Bug Adding weapon to ganger from stash

Hi all,

I do not understand how to add equipment from the stash to a ganger card. When I hopen the "equipment" section of the ganger I only have the option to equip or bui equipment from their starting list.

In the specific case I have bought a sword at the trading post and it is now in my stash, but I am unable to give it to my goliath ganger.

My gang is here:

The browser I am using is Firefox version 59.0.1 (64 bit) if that's relevant.

Yhanks for the help