Dmailer::getMilliseconds : Return value must be of type int, float returned

[webdev2027]

Hello. I've made an upgrade from v10 to v11 and change also PHP to 8.1 and use direct_mail 9.5.2

Choose and Test-Newsletter is working.

But if I want to send the Newsletter via Scheduler, I get this error: DirectMailTeam\DirectMail\Dmailer::getMilliseconds(): Return value must be of type int, float returned

The file is located Ext:direct_mail/Classes/Dmailer.php : L1473 : change return round(microtime(true)*1000); to return an integer like 180000. And now the transfer via scheduler works. Nice workaround, but does anyone know what's wrong here? Thanks.