updateEndpoint undefined on Issue page

issue_show/index.js does not pass an updateEndpoint prop to app component. Doesn't appear to affect anything, but causes warning on dev

should either pass whole initialData object, or add default value

vue.esm.js:575 [Vue warn]: Missing required prop: "updateEndpoint"

found in

---> <IssuableApp> at issue_show/components/app.vue
       <Root>