Problem:

Stop Using Bixby On Your Phone

Solution:

Adjust Bixby/Side Key Settings & Reset Bixby Voice

Adjust Bixby/Side Key Settings

Open Bixby Home

Tap Menu > Settings

Customize Bixby/Side Key options

Reset Bixby Voice

Go to Settings > Apps > Bixby Voice

Tap Storage > Clear Data > OK

Tap Clear Cache