Lesson Count return 0

Lesson Count return 0 since Tutor 1.9.5
https://www.dropbox.com/s/wywrbxp796zhwor/lesson-count-0.png?dl=0

This caused by function get_lesson_count_by_course missing course ID:

public function get_lesson_count_by_course( $course_id = 0 ) {
		return count( $this->get_course_content_ids_by( tutor()->lesson_post_type, tutor()->course_post_type, $course_id ) );
	}

public function get_lesson_count_by_course( $course_id = 0 ) {
		$course_id = $this->get_post_id( $course_id );
		
		return count( $this->get_course_content_ids_by( tutor()->lesson_post_type, tutor()->course_post_type, $course_id ) );
	}

Please review & fix it asap.