${set(afgelopenMaand,%{((new Date()).getMonth()+1) + "/" + (new Date()).getFullYear()})}

&{for issues|filter=%{'${dateformat("M/yyyy"):Created}'.equals('${afgelopenMaand}')}}
NOT WORKING
&{end}

&{for issues|filter=%{'${dateformat("M/yyyy"):Created}'.equals('%{((new Date()).getMonth()+1) + "/" + (new Date()).getFullYear()}')}}
WORKING
&{end}