I started somewhat recently eating Mcdonalds chicken Mcnuggets again, as I kinda missed this snack/meal from my youth and I was curious to see if they still tasted good like I remembered.
Well anyway they taste alright I guess, but what amazed me OP is you are exactly right.
When I looked on the ingrediants list of the tangy barbecue sauce packets I requested, one of the ingrediants on the list is soy.
So now whenever I get my standard 20 piece boxes of them, I try to switch over to ketchup after a while and not gobble up all four packets of tangy BBQ with soy ingrediants Mcdonalds usually gives to me, though I think once or twice they gipped me by giving me only two or three packets.
Oh well. They actually did me a favor, without even knowing it, in that sense.