Cancel order with failed payment throws error

Hi,

When cancelling an order with only initiated payment status, the following error comes:
> Transaction has been declined. Please try again later.

Also, when checking under order notes, orders with failed (only initiated) payment shows incorrectly as authorized:
> Authorized amount of 104,00 kr. Transaktion ID: "*******47"

Platform: Magento 2.2.6
PHP: 7.1.20
NGINX: 1.10.3
