Observed during an earlier isolated multi-session test, after a Transfer request to Chat:
ERR unknown entity in full sync 31
Stream broken, fixing...
[SyncBuffer Thread finished]
allOriginalSessionsQuitChat=true,listenersRemoved=true

The original tool observation included a queued FULL51 payload; subsequent successful test runs overwrote the rolling actual-multisession-output.log. This short observation is preserved explicitly rather than presented as a complete original trace. The final 46-test run had no such marker. Suspected source ordering: GameSession opcode61 stop() resets toolkit, then logout() stops SyncBuffer; the buffer execution thread can interleave. Exact thread-level causation remains unproved.
