github repository https://github.com/igorprodev1/vue-class-component-v8-issues ``` <script lang="ts"> import { Options, Vue, mixins } from "vue-class-component"; @Options({ computed: { m1Computed(){ return 'm1computed call' } } }) class M1 extends Vue {} @Options({ computed: { m11Computed(){ return 'm11computed call' } } }) class M11 extends mixins(M1) {} @Options({ computed: { m2Computed(){ return 'm2computed call' } } }) class M2 extends mixins(M11) {} export default class App extends mixins(M2) { get appComputed() { return 'app computed' } mounted () { console.log( (this as any).m1Computed) console.log( (this as any).m11Computed) console.log( (this as any).m2Computed) console.log( (this as any).appComputed) console.log(this) } } </script> ``` Console log: m1computed call undefined undefined app computed Proxy {…}