Concrete Breakout Strength of Shear Lug Design (Hilti Profis Program)

Hello, I am doing a "Anchoring to Concrete" calculation and am applying a shear lug to my anchor plate. I've applied a load in the Vx direction, and there is a concrete edge breakout failure. When looking at the calculation report, the controlling equation is ACI 318-19 Eq (17.7.2.1a). My question is why would this equation be considered in the design? This equation applies to a single anchor, however the shear lug should be taking the shear, not the anchor. I am not sure if this check should be applied, and that the concrete breakout should be based on the shear lug, not the anchor. Any clarification would be appreciated.