Javascript: the code after `yield` is never executed

The project uses Ember.js and ember-concurrency.

Template code:

<form {{action (perform signinTask) on='submit'}} > ... </form>

Component code:

signinTask: task(function* () { ... try { yield this.get('session').authenticate('authenticator:api', { identification: email, password, }); this.get('metrics').trackEvent({ // this code email, // is event: 'Log in', // never }); // executed } catch (error) { ... } }).restartable(),

The problem is that the code after yield is never executed. How can I fix it?