Thanks for debugging this. Unfortunately I've never started rtpengine
without the -n/--listen-ng parameter, so I've never hit this
However, I think the report was initially bogus, because
there are no changes in the rtpengine module from 2.1 (in 1.11
it doesn't even exist), so the two versions should behave the
same. This made me look into a different direction.
I've now added a note in the tutorial at the listening