Subscribed event only return the first value when there is multiple argument in callback.

[eloitay]

In the signalr.connection.js, at line 157.
SignalRConnection.prototype.listen =
/**
* @template T
* @param {?} listener
* @return {?}
/
function (listener) {
var _this = this;
if (listener == null) {
throw new Error('Failed to listen. Argument 'listener' can not be null');
}
var /* @type {?} / callback = function () {
var args = [];
for (var _i = 0; _i < arguments.length; _i++) {
args[_i] = arguments[_i];
}
_this.run(function () {
var /* @type {?} / casted = null;
if (args.length > 0) {
casted = /* @type {?} */ (args[0]); <---- this seems to be the issue but not sure if the behaviour is intended. I made the modification to args instead of args[0] and managed for it to work in my situation.
}
_this.log('SignalRConnection.proxy.on invoked. Calling listener next() ...');
console.log(casted)
listener.next(casted);
_this.log('listener next() called.');
}, _this._configuration.executeEventsInZone);
};
this.setListener(callback, listener);
};