Faulty loading of fields in Band properties expression

In iReport create 2 jrxml templates abc.jrxml and xyz.jrxml.

The first template opened in iReport is abc.jrxml,

abc.jrxml contains the field F{temp1} and xyz.jrxml contains the field F{temp2}.

When we go to Band Properties->Print When Expression->Expression Editor->Fields of the xyz.jrxml, the fields,variables and parmaters created in abc.jrxml is loaded.

Hence in iReport for all templates , in Band properties expression the fields, variables and parameters of the first opened template in iReport is loaded