CoD:MW19 Full game download required to play MP

You might want to check the link below, as it offers multiple workarounds to troubleshoot the game problem:

Troubleshoot game issues on Xbox | Xbox Support

Like yes. She has always been a problem

If that doesn't work maybe you switched an internal storage to show rather than your external maybe that could be it if you have an external hard drive.

Hi Kotarion, I hope you're doing great despite the issue you're experiencing. I am an Independent advisor and I am here to help you in regard to your concern.

I can play the game just fine, Kotarion. To fix this, please perform an extended powercycle and reset your network hardware by following the steps below:

1. Unplug the power cable from the back of the router, modem, or gateway for 5 minutes. If you have a router and a modem, unplug the power cable from both devices.

2. Press and hold the Xbox button on your console for 10 seconds or until it turns off then wait for 2 minutes before turning it on again.

3. After 5 minutes, plug the modem or gateway in first, and wait for all the lights to return to their normal state.

4. If you are using a router, plug in the router and wait for all the lights to return to their normal state.

In this case, Kotarion you may need to reach out to the game support since you have performed all the necessary steps and this is the only game that you're having an issue with, in that way they can check what is causing this.