List multiselect editor duplicating values when clicking on the cell element

[THemming]

Describe the bug
When a column is configured with a list editor and multiselect: true, when the user clicks on the cell it duplicates selected values in the cell. If you close and open the editor list again and change the selection it clears the duplicates.

Tabulator Info

• Version 6.3.0

Working Example
https://codepen.io/timhemmingFico/pen/BaXgKOY

To Reproduce
A step by step guide to recreate the issue in your JS Fiddle or Codepen:

1. Go to the Codepen above
2. Click on a cell in "Favourite Color"
3. Select a couple of values from the editor list
4. Click on the cell
5. See duplicates added to the cell value

Expected behavior
It should not modify the cell value when you click the cell.

Screenshots

Desktop (please complete the following information):

• OS: macOS
• Browser Chrome