Check Results List - Throws exceptions in the dev console log, display results are not accurate

[roopa0222]

Describe the bug
Check Results Listwebview throws errors on the console.

To Reproduce
Steps to reproduce the behavior:

1. On the Configure Checks - zzz6_2021-08-16 webview menu,
2. Check the 'Repeated Words' check box
3. Click on Show Results List.. again on the tools
4. Notice that Show Check Results webview is opened with the Results list and throws Keys should be unique exceptions on the dev log.
5. On the Show Check Results webview change the dropdown options.
6. The results are displayed based on the category

Another related issue.

1. On the Configure Checks - zzz6_2021-08-16 webview menu,
2. Uncheck the 'Repeated Words' check box
3. Notice that the results are displaying properly.

Expected behavior
The results list should come up without any exceptions and display accurate results