Based on the suggestion (solution) from @user30184, removing the spaces between the field names i.e. offset;instance;cat
and not offset; instance; cat
solves the problem. As such it produces the result I wanted.
Based on the suggestion (solution) from @user30184, removing the spaces between the field names i.e. offset;instance;cat
and not offset; instance; cat
solves the problem. As such it produces the result I wanted.