Vue3 jqxDataTable: columnGroups hierarchy does not work

[SvetoslavjQWidgets]

Describe the bug A user copied and pasted a demo from the website in Vue3 but an error is received: jqxDataTable: Column Groups initialization Error. Please, check the initialization of the jqxDataTable's columns array. The columns in a column group are expected to be siblings in the columns array.

The same demo runs in vanilla js

The demo from the site: https://www.jqwidgets.com/vue/vue-datatable/#https://www.jqwidgets.com/vue/vue-datatable/vue-datatable-columnshierarchy.htm

To Reproduce Steps to reproduce the behavior:

1. Go to https://codesandbox.io/s/blissful-curie-tl4wm6?file=/src/components/HelloWorld.vue
2. See error