Handler hangs when using datadog-agent from the Datadog-Extension layer (version 19,21)

When using datadog-agent the handler hangs (300s) then kills the container.

Using the debug log I was able to track it down to this call:

https://github.com/aws/aws-lambda-runtime-interface-emulator/blob/2ca3e4aec8ef5cec6139c531f8dd8c31dffc5bcd/lambda/rapid/start.go#L351

Any hints on what could be the issue here ?