If you want to not process the shortcodes, or for that matter run any of ‘acf_the_content’ filters when getting the value from ACF
get_sub_field('my_repeater_wysiwyg', false);
// second parameter tells ACF not to format the value
I just noticed that you are using the $post_id parameter in get_sub_field(). This function does not have a $post_id parameter, it uses the same ID given in the have_rows() call. Setting it to the post ID you are basically setting format to true.
Anyway, if it’s not formatted you can store it that way and then do
$content = apply_filters('acf_the_content', $value_from_your_stored_array);
when you actually want to display the content that value holds
