Babylonjs camera cannot work on ipad

babylonjs example cannot work on ipad,iphone is ok
Test on ipad2, version12.4.6
https://doc.babylonjs.com/examples/

it is a dupplicate of Zero touch response on ipad 7 2019 (I did all the known solutions)

I am working on a fix at the moment. I hope to have it done by tonight.