Siri text John - now she asks what app instead of just sending message. In 20 years this has never been an issue. How do I fix this?

Maybe change the contact name or just click messages. If there’s too many apps, it might be confusing for Siri to know what app to use.

Have you tried saying "Siri, send John a message in <insert name of app>?

Siri was only released 11 years ago, not 20.