Steps to reproduce

1. run the zul below

   <zk>
   <button onClick="wrap()">wrap</button>
   <spreadsheet id="ss" src="/WEB-INF/issue/blank.xlsx" maxVisibleRows="800" maxVisibleColumns="20" width="100%" 
   		height="400px" 
   		showContextMenu="true" showSheetbar="true" showToolbar="true" showFormulabar="true" 
   		/>
   		<zscript><![CDATA[
   		public void wrap(){
   			CellOperationUtil.applyWrapText(Ranges.range(ss.getSelectedSheet(),22,2), true);
   			Ranges.range(ss.getSelectedSheet(),22, 2).setCellValue("something something something something");
   		}
   		]]></zscript>
   </zk>
   

2. click wrap button
3. scroll down to row 23

Actual result

the text is not wrapped.

Workaround

disable and enable "wrap text" on the cell again.

Debug information

• Wrap a cell in the visible area doesn't have such issue.