I am using Vuforia ground plane and everything work fine with Vuforia 7.5 (with Unity 2018). After I updated to Vuforia 8.3.8 with Unity 2019.1.13f, it is very very difficult to detect the ground plane. When the ground plane is detected and an object is placed, sometimes it keeps lost tracking when I move.
How can I fix this? It's very urgent please !
My phone is a HUAWEI P20