404 response from Nexus 2 proxying Nexus 3 due to auto-routing

Topology is as follows:

RSO -> Nexus 3 -> Nexus 2 -> Maven

Output of the build command:

https://gist.github.com/djsauble/ed607c27e48356750d0b1a55d37c6cec

I checked, and the Nexus 3 instance does have the missing JAR, so that proxy appears to be set up correctly.

Support ZIPs from both the Nexus 3 and Nexus 2 instances are attached.