Controller Disconnect Xbox One

Really odd that's happening to you during some battles, @taste1t 

This might be a silly question and I'm sure you've checked, but when you double-tap the home button on your Xbox controller to check the battery level is it fully charged? There are some steps below I recommend checking out before jumping into your next game to see if they clear it up. We can't have your controller go out in the middle of a firefight. 

Xbox One:

Power Cycle the Console

1. Turn off the Xbox One console by pressing the Xbox button on the front of the console for about 10 seconds until it shuts down completely.
2. Unplug the console's power cable. Wait 10 seconds.

Important Be sure to wait 10 seconds. This step resets the power supply.

1. Plug the console power cable back in.
2. Press the Xbox button on your console to turn on the Xbox One.

Clear Mac Address

1. Clear the MAC Address: From the Xbox dashboard select Settings>All Settings>Network>Network Settings>Advanced Settings>Alternate MAC address>Clear, then restart your Xbox.

Go to your Xbox Settings and check to see if your controller has the latest Hardware Update.

https://support.xbox.com/en-US/xbox-one/accessories/update-controller-for-stereo-headset-adapter

Hopefully those steps above do the trick. I know it's not ideal, but reinstalling the game might be a good option if it continues to happen. The game files might have been corrupted during an update so it's worth a shot to see if it persists afterwards.

Thank you for the report!