[#10926] - Cells are getting merged while exporting jasper report as Excel sheet.

Cells are getting merged while exporting the report as Excel sheet. Is there a way to avoid this issue? This happens for only few reports. I have also tried adding the below properties in JRXML. But it doesn't change take effect.
<property name="net.sf.jasperreports.export.xls.detect.cell.type=true"/>
<property name="net.sf.jasperreports.export.xls.remove.empty.space.between.rows=true"/>
<property name="net.sf.jasperreports.export.xls.remove.empty.space.between.columns=true"/>

Is there a way to solve this issue?