I have had this happen enough times you can confirm it, and it's annoying and it honestly makes me want to quit your game and quit testing things that SHOULD HAVE BEEN RESOLVED BEFORE ANY RELEASE

Go into a field get into an engagement with the AI and they will instantly know your position even if you've gone prone through a wheat field that will still be able to put 100% accurate fire upon you, even if that wheat field would normally completely block a players view.