Open Settings
Tap Siri & Search
Turn off Listen for “Hey Siri”
Turn off Press Side Button for Siri or Press Home for Siri
Confirm turning off Siri if prompted
Restart your iPhone, iPad, or Mac
Go back to Settings
Tap Siri & Search
Turn Siri options back on
Set up Siri again when prompted
If needed, sign out of Apple ID and sign back in
If needed, reset network settings from Settings > General > Transfer or Reset iPhone > Reset
If needed, update your device to the latest software version