Did another small test
while ( has_sub_field('blocks') ) :
print_r(get_sub_field('title'));
print_r(get_sub_field('content'));
endwhile;
Shows only the title.
While using
get_post_meta($post->ID)
Shows the content key in the array
[blocks_0_content] => Array
(
[0] => Bla bla bla
)
[_blocks_0_content] => Array
(
[0] => field_53fc61e4d4240
)