As you are having issues, we need to troubleshoot the problem. Could you please enable debug mode when you see blank screen?
Go to wp-config.php and change
define( 'WP_DEBUG', false );
define( 'WP_DEBUG', true );
Then check if any error is shown in that page.
Also, do you have any cache plugin installed? Which theme you are using?
Is there any way I can check the issue as well?