Hello,
I´m facing similar problem with the link generated by attachment icon on Launchpad. The link points to a HTTP url while Fiori server (Gateway) is enabled to using HTTPS communicaton through the SAP Web Dispatcher working as reverse proxy. Curiously this characteristic is not a problem for Fiori client 1.2.4 but didn´t work with Fiori client 1.4 neither web browsers like Chrome navigating on Launchpad screens.
A vpn connection is not exactly a better solution considering mobility. Despite this, something enable the redirection of HTTP to correctly HTTPS connection. Could you explain a little which network (I supposed) component correct the problem?
Here I will revise the Gateway server components. After reading the SAP note 2169917 I´m not sure that the composition which we´re using is adequate.
Regards,
Rodrigo