You'll noticeTier: how much it should matter to you
3Useful: my rating, 1 to 5
2Signal: worth watching, 1 to 5
Cross-Session MessagingArea: what it touches
ImprovementsKind: in v2.1.224,
ImprovementsSection of the release
What
When SendMessage cannot find a teammate, the teammate has left, the roster has duplicate or unreadable entries, the failure is now tagged as not reachable. A new case covers the recipient's inbox write returning nothing, and tells you the message was not sent.
Evidence
Failed to write to ${e}'s inbox \u2014 nothing was sent. Try again, or message the lead.
Strings lifted out of the shipped bundle, so the claim above can be checked against them.