WP Question post__in not returning right outcomes

On the backside of my web page I’m attempting to show some latest tasks based mostly on a pre-selected checklist of publish IDs.

I’ve constructed a customized question to try to retrieve the three particular posts (WHERE custom_post_type = undertaking) on the backside of my web page

$projectIDs = array( [0] => 79, [1] => 98, [2] => 108 );

$args = array( 'post_type' => 'tasks', 'post__in ' => $projectIDs, 'posts_per_page' => 3 );
$loop = new WP_Query( $args );
whereas ( $loop->have_posts() ) : $loop->the_post();
endwhile;

PROBLEM: It’s returning 3 fully completely different posts: 110, 108, 111 – Did not even return certainly one of them. I can see within the question it filters the post_type however there isn’t any filter for the post__in …

I do not play with WP Question a lot so undecided if I am even calling it accurately BUT, once I analyse the outcomes var_dump($loop) I see the posts aren’t even being queried:

object(WP_Query)#9671 (49) {
  ["query"]=>
  array(3) {
    ["post_type"]=>
    string(8) "tasks"
    ["post__in "]=>
    array(3) {
      [0]=>
      int(79)
      [1]=>
      int(98)
      [2]=>
      int(108)
    }
    ["posts_per_page"]=>
    int(3)
  }
  ["query_vars"]=>
  array(65) {
    ["post_type"]=>
    string(8) "tasks"
    ["post__in "]=>
    array(3) {
      [0]=>
      int(79)
      [1]=>
      int(98)
      [2]=>
      int(108)
    }
    ["posts_per_page"]=>
    int(3)
    ...
  ["request"]=>
  string(276) "SELECT SQL_CALC_FOUND_ROWS  wpKX_posts.ID FROM wpKX_posts  WHERE 1=1  AND wpKX_posts.post_type = 'tasks' AND (wpKX_posts.post_status = 'publish' OR wpKX_posts.post_status = 'acf-disabled' OR wpKX_posts.post_status = 'personal')  ORDER BY wpKX_posts.post_date DESC LIMIT 0, 3"
  ["posts"]=>
  array(3) {
    [0]=>
    object(WP_Post)#9663 (24) {
      ["ID"]=>
      int(110)
      ...
    }
    [1]=>
    object(WP_Post)#9603 (24) {
      ["ID"]=>
      int(108)
      ...
    }
    [2]=>
    object(WP_Post)#9602 (24) {
      ["ID"]=>
      int(111)
      ...
    }
  }
  ["post_count"]=>
  int(3)

What am I doing flawed?