OK guys I am just after a confirmation of whether this i right / has been reported as an issue before / or should be reported :

Screenshots - First three are just to give the scenario ..

https://i.imgur.com/kjY03x7.png

https://i.imgur.com/85wBCYC.png

https://i.imgur.com/W0r05fT.png

Ok now as you can see, I have Tav as group leader selected, and go to trade with Derryth Bonecloak (or any trader really)

Then while on the Trade screen ..

https://i.imgur.com/au3brb3.png

.. I click Lae'zel at the bottom left. So now I have Lae'zel trading with Derryth Bonecloak.
Issue = When I hover my mouse over Lae'zel's Heavy Crossbow, which she is Proficient at using, the pop-up info window says Not proficient, and also will encumber Tav

Now I know this means that Tav is not proficient with that weapon, and it would encumber him, but why is that relevant if I now have Lae'zel in a trade and no longer have Tav in the trade ???

Does this make sense or have a reason why it is this way, or is it a bug and has been reported / needs reporting?

Laptop Dell G15 5510 : Win 11 x64
CPU - 10th Gen' Core I7 10870H 2.2-5.0ghz, GPU - NVidia Geforce RTX 3060, VRAM 6gb GDDR5,
RAM - 32gb (2x16gb Dual Channel) DDR4 2933mhz Kingston Fury Impact,
SSD - Kioxia M.2 NVME 512gb (System), + Samsung M.2 NVME 970 Evo Plus 1tb (Games).