braintree-web-drop-in: Base.Events: Event [payments.validated] callback resulted in an exception: TypeError: Cannot read property 'nonce' of undefined

General information

dropin 1.19.0 Production Chrome Version 75.0.3770.142 (Official Build) (64-bit)

Issue description

Random errors in console log during using of credit card and paying

https://includes.ccdc02.com/cardinalcruise/v1/ec76e625fd00ce8210aa/1.ec76e625fd00ce8210aa.songbird.js Base.Events: Event [payments.setupComplete] callback resulted in an exception: TypeError: i._getDfReferenceIdResolveFunction is not a function

and https://includes.ccdc02.com/cardinalcruise/v1/ec76e625fd00ce8210aa/1.ec76e625fd00ce8210aa.songbird.js Base.Events: Event [payments.validated] callback resulted in an exception: TypeError: Cannot read property ‘nonce’ of undefined

Using 3DS

// Initialization
braintree.dropin.create({
                authorization: self.braintreeToken,
                container: '#braintree-payment-form',
                paypal: {
                    flow: 'vault',
                    buttonStyle: {
                        color: 'blue',
                        shape: 'rect',
                        size: 'medium'
                    }
                },
                threeDSecure: {
                    amount: self.price()
                }
            }, function (createErr, instance) {
                if (createErr) {
                    failedToInitialize();
                }
                self.braintreeInstance = instance;
            });