Steps to reproduce:

1. run zssapp
2. write "This text is not displayed in Excel as in Spreadsheet" into cell C43
3. set Wrap text to cell C43
3. merge cells C43 and C44
4. File > Export

Result:

In Excel is not visible all text in merged cells C43 and C44 as in Spreadsheet.

Expected behavior:

The text is visible in Excel as in Spreadsheet.
The height and width of cells in Excel is the same as in Spreadsheet.