[QoL Improvement] Allowing more than one player to interact with NPCs/stash/etc in couch co-op

Issue
I've been playing a lot of couch co-op and one issue that has come up again and again is how only one player can interact with an NPC (trading and quest rewards) at a time. Same applies to the stash, salvage bench, etc.

Player A would have their inventory open but once the other Player B talks to an NPC or does any of the other options mentioned above, it automatically opens a full screen dialog and interrupts Player A's flow.

What I've had to do is be efficient and mentally keep tabs on the items I'm going to sell and then which ones I'm going to disenchant before talking to the NPC in order to minimize downtime for the other player

Suggestion
It would be amazing quality of life feature/improvement if both players could simultaneously interact with NPCs to trade, etc instead of taking turns. Especially if the other user has their menu open on their side of the screen.

One idea would be to combine your inventory tab together with the shop's tabs in the shop example and the stash tabs in the stash example.