Loading a spreadsheet with "Import children" loses data

[roverwolf]

1. Login as an editor
2. Add a test framework with name ‘Test Framework Markdown Editor’
3. Create different items which includes Tables, Expressions, Katex, HTML, and also Markdown items under this framework
4. Then select Export
5. Open the downloaded excel file
6. Now go to the UI and access another existing test framework (with no items), if you don’t have one create one
7. Select Import children, then select Import local file tab/ Choose File/ Select the downloaded excel file
8. Select the framework name ‘Test_framework_Import_Vas’ from the ‘Framework to be associated’ dropdown
9. Select <Import Children> button

Actual Result: Issues:

1. Missing items for the children for KaTeX, HTML, Markdown items (please view the screenshots 1 and 2 from excel and from the new framework where the import process was done)
2. Go back to the framework 'Test Framework Markdown Editor' and expand the items, surprisingly I see some of the items are missing (I mean blank names shown and titles are missing and even content for those items) (see screenshot 3)

Ref: SALT-40