Extending components in custom plugins worked in 3.5 but does not in 3.6

This used to work in 3.5 but no longer works in 3.6.

panel.plugin('myProject/customFile', {
   components: {
      'k-file-view': {
         extends: 'k-file-view',
         template: `<h1>My custom view for k-file-view</h1>`

Does anyone have any insight on workarounds?

Alright, it seems this was a regression caused by 3.6.1 that is now fixed in