Please let me know in which section of our platform the costs are being entered? Or, are you referring to the shipping costs within the Settings > Shipping > Zones section on WooCommerce’s backend?
Thank you for your reply and for confirming the section.
I am afraid this is an issue that you should check directly with the support of WooCommerce since our plugin has no control over the described behavior.
I will proceed with closing this ticket here but do not hesitate to contact us directly in case you have any questions. Our support channels can be found here.
This is not something related to Woocommerce. We discover that this only happens for our clients working with sendcloud. It looks like there is some round function after save.