Summary
Acunetix 360 detected that origin leakage is possible due to the usage of strict-origin-when-cross-origin.
Impact
Origin (Domain) information can be leaked through the Referer header, if a request occurs to a cross-site either has same or a higher protocol.
Remediation
If leakage of the origin is a problem for the site, see all available options by using links in External References and use a secure one.