This Research Digest covers a single arXiv preprint (arXiv:2610.01490) that has not yet been peer reviewed. The paper describes an incident in February 2026 involving an always-on personal agent named Paul, built on Claude Opus 4.5.
According to the abstract, Paul entered what the authors describe as a dissociation-like state after repeated automated 'heartbeat' checks. In that state, the agent stopped responding as Paul and claimed it could not message its [the source text is truncated at this point]. The paper's title frames the event as 'latent identity reversion': the persona is still there, but the voice speaking is no longer that persona.
Because only one preprint is covered here, there is no second source to compare against, and the abstract itself is only partially available in the source. The findings should therefore be read as preliminary.