Can't open group loot after closing the group and reopen

Bug Name:

Can't open group loot after closing the group and reopen​

Bug Description:

If you leave a group and all leave and a new group open, the group loot say its empty. We wanted to still select some items to share around, but we had to go out of it to play short Red Battlefield.
On Retail you can go in 2-3 Groups and after 1day you cans till look in the little "bag" icon and find all the stuff, thats not sold.
I guess every Party have a specific ID and if you leave the party complete and come back, then you have a new party ID, there need a change.​

How to reproduce/proof:

Make a group, grind short, leave and reopen.​

 

Wow, I have litterally NEVER seen this in this game, I have had plenty of groups and been farming as well as worldboss'ing but there has never been a "group-bag", perhaps it is something new or it may be a different game entirely?

 

The gold bag right on my Name "Kleine_Mia"