Each host can only listen on one port once.. In this case the host 10.44.132.28 is already listening on port 8080 for traffic that reaches the firewall on the dmz interface on port 443 on one particular IP.
In this case you must use a different port than 8080 or a different host on the inside,
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Julio Carvajal Senior Network Security and Core Specialist CCIE #42930, 2xCCNP, JNCIP-SEC
I thought this may be the case, but wasn't sure if there was a work around for it. Unfortunately the device listening on tcp/8080 is a proxy server so it will only allow inbound connections on port 8080.