'handleExceptions: true' log twice

[RafeSafari]

There is only one transport, added like this:

winston.add(winston.createLogger({
    transports: [
        new winston.transports.Console({
            handleExceptions: true,
            format: winston.format.combine(
                winston.format.simple()
            ),
        }),
    ]
}));

When a new Error thrown from index.js:
throw new Error('++++ I will log twice ++++')
will result in two separate logs!

I've also tried transport.File({ ... }), but the same result.

[RafeSafari]

Updated stackoverflow question is here: https://stackoverflow.com/questions/55236098