remove.empty.space.between does not work in XLSX

We have a separate system that until recently generated Jasper reports in XLS format and now generates XLSX instead.

In converting the export properties to support the new format I noticed that these two properties have no effect on the output;

<property name="net.sf.jasperreports.export.xlsx.remove.empty.space.between.rows=true"/>
<property name="net.sf.jasperreports.export.xlsx.remove.empty.space.between.columns=true"/>

I've tried with the older format of value="true" but it doesn't work either.

Is there some other property I should be using instead or is this functionality missing in the XLSX exports?

Edit to add:

I have tried the original XLS version of the setting and it does not not affect the output, as expected.