no
add_filter('acf/load_value/name=<strong>cv_row</strong>' ...
but
add_filter('acf/load_value/name=cv_row' ...
by filename I meant cv_row
I understand where I made a mistake.
this key: field_5e1a03262c898
should refer to the field after which we iterate.
and this filed name add_filter('acf/load_value/name=<strong>cv_row</strong>' ...
should refer to row.