I've just tried out Model targets for the first time, going through Unity 2019.2.
I'm using multiple devices:
The app is lagging severly in iPhone SE and iPad 2018.
In the iPhoneXR some lag is also present but not as much.
I have a very simple scene with the model and I put a cube on top of it as test.
What can I do to optimise the speed? Are there any known issues with some devices?