All rows below a table are not shown (grey background only).

The sheet is not protected. Any ideas how to unhide?

I can change the hidden status of those rows using

ThisWorkbook.Sheets("Sheet1").Rows(lastTableRow+1).Hidden=false 

with no error message, and

debug.print ThisWorkbook.Sheets("Sheet1").Rows(lastTableRow+1).Hidden 

returns false but the row remains hidden.

Hiding and unhiding works as expected for rows in the table.