Xbox signs me out

Try to delete your profile (profile only), clear
system cache (3 times), download your profile again.

See if the above works...

Set the console to remember your password

After you download your Xbox Live profile to a console, you are asked if you want the console to remember your password.

Remember password

This option determines whether you need your Microsoft account password to sign into your profile. TheRemember Password option is off by default, which means you’ll be prompted for your Microsoft account password when you sign in with your
Xbox Live profile.

If you don’t want to be prompted for your Microsoft account password every time you sign into Xbox Live, select the Remember Password option.

OR

Change the password protection on your profile

The Remember Password option is set after you download your Xbox Live profile. But you can change the password protection on your profile at any time. Here’s how:

Don’t require a password to sign in

If your Xbox Live profile is password protected, you can change this the next time you sign into your Xbox Live profile. When you’re prompted for your Microsoft account password at sign in, select the Remember Passwordoption.

If you select the Remember Password option, you won’t be prompted for your Microsoft account password the next time you sign in to your Xbox Live profile.

Complete Details HERE.

Hello,

Please try the everything in the exact order it's written in: delete your profile (PROFILE ONLY), clear system cache (3
times) IN A ROW,
restart your console (important), download your profile again.

Note: If you can't delete your profile, please turn off your console, remove the storage device, and then plug it back in and start the console.

See if the above works for you.

I have done all steps as this has been happening to me in the last 3days got nowhere with Xbox support who told me to come on here and raise the issue which I have done. If I get any answers I will get bk too you also, but it's driving me madiI have to say!

The most common solution is to delete your gamertag, clear
the console cache and re-download your gamertag.
This will restore all the credentials on your console and remove the existing ones, here’s how:

1. Go to Settings, and then select System.
2. Select Storage.
3. Select All Devices.
4. Select Gamer Profiles.
5. Select the gamertag that you want to delete.
6. Select Delete.
7. Select one of the following:

• Select Delete Profile Only. This deletes the profile but leaves saved games and achievements.
  
• Select Delete Profile and Items to delete the profile and the associated saved games and achievements.
  

Then clear the system Cache.

1. Press the Guide button on your controller, go to Settings, and select System Settings.
   
2. Select Storage or Memory.
3. Highlight any storage device, and then press Y on your controller. (It doesn't matter which storage device you select; the cache will be cleared for all storage devices.)
   
4. Select Clear System Cache.
5. When prompted to confirm storage device maintenance, select Yes.

And finally restore your gamertag.

1. Press the Xbox Guide button on your controller (large X button in the centre of your controller).
   
2. Select Download Profile. Note Not seeing Download Profile? Press X to sign out of your profile.
   
3. Enter the Microsoft account associated with your Xbox Live gamertag. If you don’t know your Microsoft account or password, see Find your
   Microsoft account or password.

1. Now, enter your Microsoft account password. Note If your account is an Xbox Live child account, the parent’s Microsoft account information is required to download the profile.
   
2. Select the storage device for your profile (for example, Hard Drive).

Your profile will begin downloading. Once your profile is downloaded, you can choose whether or not you want to require your Microsoft account password to sign into your profile. You can now sign in using your Xbox Live gamertag on this console.