I've a problem when coming back from sleep mode in iOS when project is loading. The script playcanvas-stable.min display this error.
To reproduce it you have to press the sleep button while loading a play canvas project and then coming back. The heavier the project the more it will happen.
My guess is in this case
success() called for 206 (partial file). If I understand it right, the function can be called even if the JSON downloaded is not complete.
Thanks let me know if you need more infos.