Error in tests when stub teleport

[tk-tim]

Describe the bug
In version 11 and previous I could mock teleport globally and tests would pass. From version 12 they are failing or there is at least warn [Vue warn]: Unhandled error during execution of app errorHandler.

Mock:

import { config } from '@vue/test-utils';

config.global.stubs = {
  teleport: true,
};

To Reproduce
Steps to reproduce the behavior:

1. Run pnpm test:unit
2. Test will crush

Here is simplest vue project with this bug https://github.com/tk-tim/vue-datepicker-issue

Expected behavior
Test should pass, since I don't even use teleport. But it was also alright in v11 when I used prop :teleport="true".

Screenshots