After update 5.6.1f my WebGL build can't load scene correctly. Develop build and DebugSumbols activated - same result. No errors, no warnings.
Always was load empty scene, but with NotDestroyOnLoad objects after prevois scene.
Same problem, but no answer. https://forum.unity3d.com/threads/black-screen-when-changing-scene-in-webgl-using-unity-5-6.473367/