Error on loading/unloading scenes

[Little-Big-Monkey]

I’m experiencing errors on WebGL on scene switch (loading/unloading level).

The problem is it’s only happening in release mode. When I’m trying to debug it, with dev mode and/or exception, nothing happen and the game work normally.
The game has no error in the editor or any other platforms.
I’m running on Unity 5.3.4, and there was no error with 5.2.X.

I have tried to narrow down the error by deactivating scripts without success.
How can I debug this ?

[jonas-echterhoff_1]

As the error says, look in your browser JavaScript console for more info. You can make a development build of your game and post the console output here, maybe someone will be able to tell what is going on using that.