Ticket - Initial Review Due and Completion Due prefilled

Hi,

I am using SLA routing rules to assign a Service Level to a Customer based on the ABC Classification. When the customer has no classification assigned, no SLA is determined when creating a ticket. However when I create a ticket for a customer without a classification, in the overview tab in the timeline-section, the fields Customer Due and Completion Due are prefilled with some deadlines. I need to know where this dates come from?

BR,

Bartosz