HAproxy Standalone Add to Home Screen

My Standalone webApp runs behind a HAproxy configuration with SSL termination.
All non-secure connections are rerouted to https in HAproxy.
It all works very well but for one oddity; when I open the url on an iOS device, it opens as expected, redirected to https if I did not start with https://

But when I use the Add to Home Screen option on my safari browser, to make use of the full screen, and open that app, I am routed to the server’s default page rather than my web app.
Apache is not running.

Can anyone tell me why I get the default homepage instead of my web App when starting the Add to Home screen created app?

My HAproxy.config is as follows;

        log local0
        maxconn 4096
        tune.ssl.default-dh-param 2048

        log global
        mode http
        option httplog
        option dontlognull
        retries 3
        option redispatch
        maxconn 2000
        timeout connect 5000
        timeout client 50000
        timeout server 50000
frontend http-in
        bind *:80
	bind *:443 ssl crt //etc/haproxy/Certificates.pem
        redirect scheme https if !{ ssl_fc }
        acl is_myapp1 hdr_end(host) -i printervana.com
        use_backend myapp1pool if is_myapp1
        use_backend myapp1pool if { hdr(host) -i printervana.com }
	default_backend myapp1pool

backend myapp1pool
        option httpchk OPTIONS /
        option forwardfor
        option http-server-close
        cookie serverid insert indirect nocache
        server node1 localhost:8080 check cookie node1
        server node2 localhost:8081 check cookie node2
        server node3 localhost:8082 check cookie node3

listen haproxyapp_admin:9100
	mode http
	stats uri /