A worker that saw a new remote session ID rebuilt its agent and also
picked a new local ID. On the answer path nothing carries that ID back,
so the next offer made the remote see a changed session, rebuild, and
answer with yet another ID. Two peers kept tearing down working ICE
connections on every offer and answer; nearly every answer in the
affected logs carried a new remote session ID.
Only a local restart changes the local ID now: a failed negotiation, as
before, and an explicit Close, which previously kept the old ID and left
the remote answering from a negotiation this side had abandoned.
Following a remote restart keeps the ID the remote already knows, so the
pair settles after one rebuild, also against peers that still pick a
new ID when following a restart.
Maycon Santos
e72be6698f