So far all of them I've flown. P38, P47, P51, Typhoon, Spitfires. When the padlocked target gets near the center forward view, it stops tracking and hold the position until the tracked target comes out of the center. I assumed it was the HUD/Sights that were blocking the tracking like the wings or back of the seat. I use padlock a lot in combat and this is really annoying. I'm sure it's just a graphics issue with the new reflections, shadows, etc.