Shield Pen on Overgrowth Objective(s) [Exploit?]

I noticed a player using cloaking and a full set of Shield Pen gear making constant runs at our far back sentry. I don’t recall if this worked or not, but it was very deliberate. Is this an intended strategy?

It was a way to cheese in early access on PC. I thought they fixed it.

It was probably someone testing to see if it still works. I will report if I see it again, just wanted to make sure others have or have not noticed.