Session teleportation (resume from web) now tracks whether the first message after resuming succeeds or fails, helping diagnose issues with session transfers.
Evidence
obA() at line 2424 (sets teleportedSessionInfo.isTeleported and hasLoggedFirstMessage), with events tengu_teleport_first_message_success and tengu_teleport_first_message_error
Strings lifted out of the shipped bundle, so the claim above can be checked against them.