I'm noticing that often when I am running my project, the camera framerate will begin running at a very smooth 60fps, but then drop to what appears to be 30fps. When the framerate drops, panning movements look really bad because the 3D elements are still drawing at a higher framerate. I've been developing this project with ARFoundation 2.1.0 and Unity 2019.1.4, but noticed couple days ago that 2.1.1 was available so I moved up to that. I noticed that 2.1.1 has a toggle on the ARSession component to attempt to match Unity's frame rate, but that doesn't seem to be helping. This problem persists with 2.1.0, and 2.1.1 with both settings for the match frame rate toggle. I'm running on the most recent iPad Pro so I would not think that processing power is an issue here. Is this a known issue?