Hello Larian,
I am not sure if this is the right place to report bugs.
Scenario:
1) Playing as a rogue and convinced the Zhentarim guy that we keep the chest.
2) In the Zhentarim hideout after talking to Zarys she says that I can not purchase the finer things. However this is not unlocked with the trader.
Dont convince Rugar to split the chest with you. Thats the key. Let him keep it. Just make nicey nice with him, and once you're in the Zhent hideout Zarys will let the trader show you the good stuff. Ive tested this multiple times now and it always works.
But whenever I get the chest it always bugs out and even though Zarys says the trader will now show you the good stuff, he still doesnt. The way you'll know it works is after you talk to Zarys you'll get a journal update and some XP(I think, dont quote me on the XP, but you definitely get a journal update)