Hello, Wayne.
We are not familiar with the issue. Could you try intercepting traffic between proxy and UWS? If proxy software runs on a system you control, you could install
Fiddler on the same box where proxy is. Fiddler is a great tool and very easy to use. IF you don't have access to proxy box, consider installing some TCP tracer utility on the UWS box to see whether proxy even reaches the box, and if it does, how UWS responds.
Best regards,
UltiDev Team.
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