Hello, @Oliver Theiß,
You can contact the plugin support via comments on codecanyon – https://codecanyon.net/item/woocommerce-dynamic-pricing-discounts/7119279/comments
OR contact form on this page – https://codecanyon.net/user/rightpress and chat – https://prnt.sc/uQ7IZ28L528a on this page https://support.rightpress.net/hc/en-us
And please do not forget to mention that the problem is independent of the theme and occurs with the default WordPress Theme as well.
Regards 8Themes Team.
