PHP list don't answer during processing


I use PHPList 3.0.12 in a shared hosting with a mailgun smtp.
When I send a campaign with the google analytics stats enable, when a user click on a link inside the mail it goes first to PHPList to save the traffic and after he go to the clickedl destination.
If PHPlist is still processing the campaign it’ll don’t answer to the user, so the user will not go to the clicked destination.

Is it possible to don’t have this error?

Thanks, regards.

@PanBagnat It sounds like a problem with database tables being locked.
How are you processing the queue? Is it a cron job or through the admin browser interface? I used to sometimes see your problem when processing the queue in a browser.