I almost always have "keep faces together" on in my default workflow so I know that's not it. With "cut faces," it makes sense as that happened on the apache around the early splits in the nose area which I fixed. I noticed it again after extruding the air intake above the cockpit and splitting the area around the nose to make a harder edge for the cockpit....I merged the various vertices so it's not a big deal but I figured since it wasn't happening to you in the video, there must be something I'm missing here or doing wrong.