Greetings curtixman,
Music shouldn't start playing unless requested to do so when using Siri. Since having this issue have you restarted your iPhone? If not, restarting is a great step that can resolve many issues. For reference, the steps for restarting iPhone X and later models can be found below. You can also find these steps, along with the steps to restart other iPhone models in the following article.
- "Press and hold either volume button and the side button until the power-off slider appears.
- Drag the slider, then wait 30 seconds for your device to turn off. If your device is frozen or unresponsive, force restart your device.
- To turn your device back on, press and hold the side button (on the right side of your iPhone) until you see the Apple logo."
Restart your iPhone
If you continue to have issues after restarting the iPhone, ensuring your iPhone running the latest iOS is another great step that can provide a solution. If you need to reference the steps for updating iOS, those steps are outlined in the following article.
Update your iPhone or iPad
Let us know how that goes!