empty fields makes fields dissapear and mixes field names in object $data

precedent empty makes it and the following field to dissapear from $data and change field name of following field

lets say we have fields in a view
field1
field2
views_customfield

and on the results one of rows has field1 empty
then data->node_data_field_field1_field_field1_value and data->node_data_field_field2_field_field2_value
do not exist
meanwhile there is
data->node_data_field_field1_field_field2_value
which holds the value that should be
data->node_data_field_field2_field_field2_value

$d->node_data_field_cruise_id_field_cruise_id_value

in the screenshot on the first setup I get everything as expected

on the second setup I get
$data->node_data_field_cruise_id_field_cruise_id_value and $data->node_data_field_duration_field_duration_value correct but for the row that is missing duration (empty duration) I only get this field $data->node_data_field_duration_field_cruise_id_value which holds the cruise id (the other two fields are missing