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vue 3 + ts + router - new project - Component not loading.. inconsistent hot reload, throwing error when making changes to Home component

See original GitHub issue

Version

4.5.4

Environment info

mac os: 10.15.4
node: 14.5.0

Steps to reproduce

create a new project
npm run serve
initially threw error to enable plugins form decorators and decorators-legacy in babel
second time np run serve, successfully compiles
HelloWorld Component is missing.
developer console throwing warning: Failed to resolve component.
making changes to Home Component throws same decorators error.

What is expected?

build successfully load components succesfully

What is actually happening?

build is sometime successful sometime fails some components are not loading

could be issue with Decorators?
could be issue with Router Component?

warning in dev console

runtime-core.esm-bundler.js?5c40:38 [Vue warn]: Failed to resolve component: HelloWorld at <Home onVnodeUnmounted=fn<onVnodeUnmounted> ref=Ref< undefined > > at <RouterView> at <App> warn @ runtime-core.esm-bundler.js?5c40:38

warning when compile fails

ERROR Failed to compile with 1 errors 8:28:12 pm

error in ./src/views/Home.vue

Module Error (from ./node_modules/vue-loader-v16/dist/index.js): This experimental syntax requires enabling one of the following parser plugin(s): ‘decorators-legacy, decorators’ (7:0)

@ ./src/router/index.ts 3:0-37 7:13-17 @ ./src/main.ts @ multi (webpack)-dev-server/client?http://192.168.0.149:8080&sockPath=/sockjs-node (webpack)/hot/dev-server.js ./src/main.ts