Today I got a voicemail notification on my iPhone for a message that was left on Monday afternoon. Later, our family group chat lit up with new messages but my daughter appeared as Maybe: Fiona Haughey, despite being on our iCloud Family account for the past 10 years.
That sounds like ‘Siri’ sussing out identification from context clues in the text. Instead of from contacts. Which it wants to do even if a more direct connection is made via contacts APIs
But maybe she got a new phone, new number?