I think I have the same issue. I have a repeater in the options area of site #12 and I can’t access it from site #2.
// on site 12, works, displays all the data in the repeater
print_r( get_field( 'featured_items', 'options' ) );
// on site 2, only shows "6", the number of items in the repeater
switch_to_blog( 12 );
print_r( get_field( 'featured_items', 'options' ) );
restore_current_blog();
// on site 2, this is a text field, this works
switch_to_blog( 12 );
print_r( get_field( 'company_name_long', 'options' ) );
restore_current_blog();