IBL / Error: Cannot load image

Hi,


Randomly i get this error : [SceneKit] Error: Cannot load image (null). Using dummy texture. (with a black texture on the node).


Has anyone ever encountered this problem ?


Additional data:

- my application use IBL rendering (HDR image for the lighting environment) ;

- frequency of the bug 1/100 on recent device (eg iPhone 7) 2/4 with an old device (eg iPhone 6) :

- preloading assets have no effect (eg prepareObjects withCompletionHandler) -> the callback is always success ;

- changing the size of the texture have no effect.


Most critical part : I didn't find a way to prevent or to detected the problem.


Thank's for your help !