I set up the Google ARCore example project the other day and I was able to run the HelloAR scene fine. Yesterday however, I tried to run it again and I'm getting some bizarre rendering problems. It appears to be rendering multiple times in various mirror states, which change depending on orientation. The point cloud dots aren't being cleared every frame, making weird symmetrical lines everywhere. The real world isn't displayed apart from some smudges that might be the camera trying to capture something. When I run, logcat come sup with an error saying "Unable to find instant_preview_unity_plugin", which makes me think this might have something to do with the problem. This plugin does not appear to be in the plugins folder. However I don't want to use instant preview, so I've turned it off in ARCore settings, but it still appears. I'm running Unity 2018.1.5f1 and I've also tried it in 2017.4.5f1 with the same result. I've run on a Galaxy S9 and a Pixel 2, both with the same result. Has anyone come across this before? Thanks.