tinymce js file cache causing problems

  • Unless I’m going crazy it looks as if the main tiny mce js file gets cached, on the server?

    My plugin adds a new button to the tinymce toolbar and I’m getting a number of reports from users about the button not appearing for them straight away, only after a few hours/days. I think its this cache because if I change the init array, it immediately appears.

    As far as I know, this code should fix it:

    function my_refresh_mce($ver) {
  $ver += 3; // or $ver .= 3; or ++$ver; etc.
  return $ver;
}
add_filter('tiny_mce_version', 'my_refresh_mce');

    But do I run this only once or should it be part of the main plugin filters that gets called on every page load?

    At the moment I only call it when the plugin is installed/updated but it seems to have had little effect.

    If there is no cache, what else could it be?

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