Possible bug – multiple emails being sent for purchase

Hi

I followed your advice from a year before but I still have some products that are using this plugin.

I made a sale yesterday and both the buyer and I have received 16 emails with the download link.

How do I stop the emails? Fortunately this is a long time buyer and is being understanding but I need a solution.

I checked the debug file and the plugin is sending the email every few hours.

Thanks in advance