Default submission interval is too long

If I'm reading the code correctly, the default submission interval is 86400 * 60 * 60 = 311,040,000 seconds = nearly 10 years.
This... is too long.

From simple_sitemap_engines.module:

function simple_sitemap_engines_cron() {
  $config = \Drupal::config('simple_sitemap_engines.settings');

  if ($config->get('enabled')) {
    $interval = (int) $config->get('submission_interval') * 60 * 60;
    $request_time = \Drupal::time()->getRequestTime();

From simple_sitemap_engines.settings.yml

enabled: true
submission_interval: 86400

I think the * 60 * 60 bit should probably be eliminated, so that the submission interval can be specified in seconds as expected, right?