[data export] When Scrolling Through Results, Header Disappears

[nickytorstensson]

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Describe the bug In the Data Export, if the list of records returned is sufficiently long, then the header - which is pinned/frozen to the top when scrolling - at some point disappears

To Reproduce Steps to reproduce the behavior:

1. Go to Data Export
2. Run the query SELECT Id FROM Account (assuming many records
3. See list returned
4. Scroll down
5. Header disappears
6. Scroll a little bit up, farther than the point when the header disappeared
7. Header reappears

Expected behavior Expected header to be shown at all points of time when scrolling

Screenshots On first image, notice in the right hand side, that it is scrolled a bit down, and the header has disappeared. On second image, notice that there has been scrolled a bit up again, and the header is there (appeared).

Desktop (please complete the following information):

• OS: Windows 11
• Browser: Chrome
• Version 127.0.6533.89

Additional context Nothing more