About using DAPS in DaVinci Resolve V18.0.1 -

Recently I upgraded from V17.4.6 to V18.0.1. I found out that I can't use external Dolby Atmos Renderer like in V17.Unable to establish metadata transfer with external Renderer.

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The Dolby Atmos panning/daw metadata is sent over ethernet to the IP address your renderer is set on. I wonder if updating Resolve hasn't copied across any security settings to let the network traffic out of Resolve? I just tried to snoop the ethernet traffic from V18 and couldn't actually see anything on 127.0.0.1 coming from Resolve, but Dolby don't make this sort of information available to debug unfortunately so looking at a blank hole somewhat.