Contact customer form - email subject translation not applied

Shopify Partner
4 0 2

If you contact your customer direct from order page or customer page (click on email address to open contact form), the subject line reads "Message from {{ }}".

We have edited the subject line in notification settings, but even though the body is applied, the subject line does not apply. Notifications -> Contact customer.

Have been working fine until the latest Shopify update. 

Did Shopify hard code the subject line and can't be modified, or am i just missing something here?