Calculated Column is incorrectly not rendered when spanning multiple columns

## Describe the bug
When using a datagrid that includes frozen columns and multiple spanning columns, when selecting the first set of spanning columns and scrolling, the second set of spanning columns are hidden

## To Reproduce

1. shrink the window to ~850 px wide
2. click on the header cell containing '8'
3. scroll to the right on the datagrid until the '16' header cell disappears

Link to code example:
[BugTest.txt](https://github.com/adazzle/react-data-grid/files/14200464/BugTest.txt)

## Expected behavior
the spanned column should remain visible when part of it is hidden behind the frozen columns

## Environment

- `react-data-grid` version: all versions
- `react`/`react-dom` version: all versions

## Additional context