Capture Feature

Check if the game you are playing allows screenshots, as in some games it is not possible to take screenshots.

Your mic is not captured by this feature but you may use other apps to do it

Hi BipedFlounder51! My name is Ricardo an independent advisor ready to help you with this situation!

Please try this

Turn off the Xbox console by pressing the Xbox button on the front of the console for about 10 seconds until it shuts down completely.

Unplug the console's power cable. Wait 10 seconds.

Plug the console power cable back in.

Press the Xbox button on your console to turn on the Xbox

If this doesn't work, Try to restore keeping games and apps, please be sure that you know your account email and password:

Press the Xbox button to open the guide.

Select Profile & system > Settings > System > Console info.

Select Reset console.

On the Reset your console screen, you'll see three option use this one, be sure you remember the email and password of you're accounts:

Reset and keep my games & apps. Use this option as your primary choice when troubleshooting. It will reset the OS and delete all potentially corrupted data without deleting your games or apps. In some cases, if a corrupt game file is causing the issue you're troubleshooting, you may have to choose Reset and remove everything, but you should always start with Reset and keep my games & apps

What is you xbox os build?

> 19041.3068 maybe has DVR problem.

and the insider build have the problem too,

And you can check your hdd

or try use the usb hdd to save DVR.

What version of Xbox OS you'r using?

After OS version - 10.0.18363.7194 (19h1_release_xbox_dev_1910.18363.7194.190929-1945) Release date 10/8/2019; whe got the
new feature:

Flexible capture settings

You now have more control over what gets captured and recorded in games. In Settings > Preferences > Capture & share, choose between “Captures by me,” “Captures by me or games,” and “Don’t
capture.”

Try to change that.