Yesterday we've released an update for Remote Utilities - version 220.127.116.11 where we implemented a number of fixes. Could you please try updating your installation to the latest version 18.104.22.168 and see if the issue with the screen blanking still persists? The latest version 22.214.171.124 is available for download on this page. Alternatively, you can update your installation using the Self-Update feature. When updating, please make sure to update both Host and Viewer to the same version.
Please let me know if the issue persists after the update.