remove_action from other plugin file

Hello all,

I am working on a custom plugin. I want to remove an action in one file, that is added in the other. But some how it’s not being removed.

My code is as follows:

custom-functions.php

class Apollo_Custom_Functions {
	public function __construct() {
		add_action( 'save_post', array( $this, 'member_title' ), 10, 2 );
	}
	public function member_title( $postid, $post ) {
		# Can a user save a match?
		if( ! current_user_can( 'edit_members', $postid ) ) {
			return $postid;
		}

		# Check if the post type is matches
		if( 'members' !== get_post_type( $postid ) ) {
			return $postid;
		}

		# Check the nonce
		if( ! empty( $_POST['meta_noncename_' . $post->post_type] ) && ! wp_verify_nonce( $_POST['meta_noncename_' . $post->post_type], basename( __FILE__ ) ) ) {
	        return $postid;
	    }

		# Make sure it's not autosave or rivision
		if( ( defined( 'DOING_AUTOSAVE' ) && DOING_AUTOSAVE ) || $post->post_type == 'revision' || $post->post_status == 'auto-draft' ) {
	        return $postid;
	    }

	    if ( wp_is_post_revision( $postid ) ) {
	    	return $postid;
	    }

	    // unhook this function so it doesn't loop infinitely
		remove_action( 'save_post', array( $this, 'member_title' ), 11 );

		$firstname = get_post_meta( $postid, 'member_first_name', true );
		$insertion = get_post_meta( $postid, 'member_insertion', true );
		$lastname = get_post_meta( $postid, 'member_last_name', true );

		# Set title and slug
		$member_title = $firstname . ' ' . ( ! empty( $insertion ) ? $insertion . ' ' : '' ) . $lastname;
		$member_slug = sanitize_title_with_dashes( $member_title, 'save' );
		$member_slug_sanitized = sanitize_title( $member_slug );

		//echo $member_title;

		$postdata = array(
			'ID' => $postid,
			'post_title' => $member_title,
			'post_name' => $member_slug_sanitized,
		);

		wp_update_post( $postdata );

		// re-hook this function
		add_action( 'save_post', array( $this, 'member_title' ), 10, 2 );
	}
}
$apollo_custom_functions = new Apollo_Custom_Functions();

And in the import.php I want to remove this action (to avoid that it saves the post with an empty title).

class Apollo_Import_Members {
	public function add_member( $memberdata ) {
		# Remove the save post action to avoid an infinite loop.
		global $apollo_custom_functions;
		if(has_action('save_post', array($apollo_custom_functions, 'member_title'))) {
			echo 'yes';
		}
		remove_action( 'save_post', array( $apollo_custom_functions, 'member_title' ), 99 );
		//remove_all_actions( 'save_post', 1 );
		// Some more code here.
}

I am getting a YES when I check if the action exists, but it’s not being removed. Does anyone have any idea what is going wrong here? I am totally in the dark.