This has been happening for several months (around 6 if I had to guess), but I havent been active during that time.

On the screens where the display turns tabs orange when there are notifications or updates, my trade tab stays lit. None of the sub-tabs (trade broker, player trades, etc) are lit, and when investigated also do not have activity. At no point has the alert status of being orange gone away. It has only happened with this tab.

It's a very old and archaic way of handling the notifications. I just went ahead and manually turned yours off. I am not really sure what would cause it to be stuck on - perhaps you received a Trade at some point, but then the Trade expired and was sent back and the notification stayed on?