Is there any known bugs with UK orders and shipping insurance?

Currently, with a UK-based Easyship account and orders/shipments that having shipping insurance. shipping rates are not returned via API.

I tested 3 orders with 3 different combinations of destination and origin, all resulting in 0 rates.

Those being orders from the UK to the UK, UK to the US, and the US to the US.

Can anyone provide some insight?