You'll noticeTier: how much it should matter to you
4Useful: my rating, 1 to 5
2Signal: worth watching, 1 to 5
SessionsArea: what it touches
New FeaturesKind: in v2.1.251,
What probably matters to youSection of the release
What
Trying to resume or fork a session that is currently running as a background session now explains the situation and gives the options: attach to it, stop it, or fork a copy. Previously this surfaced as a generic error.
Details
Triggered whenever the target session is detected as an active background job. Available to everyone, no flag.
Evidence
That session is still running as a background session
Strings lifted out of the shipped bundle, so the claim above can be checked against them.