Availability of newer Xbox controller firmware for update with PC, not Xbox console

That was my answer. I'm not sure if it's supported by newer consoles and firmware/dashboard updates. I would contact Xbox support directly, as information on this subject isn't readily available.

That better?

Have you downloaded and installed the drivers for Xbox One controllers on PC?

If not, you can find them here:
majornelson.com/.../pc-drivers-for-the-xbox-one-controller-available-now

If you have an Xbox One, could you use that to update the controller's firmware (Settings>System>Update Controller)?

Let us know how you get on.

If you need to update your Xbox controller firmware and don't have access to another controller to do so

Use the Xbox Accessories app on Windows 10 If you have a Windows 10 computer, you can try updating the controller firmware through the Xbox Accessories app. Connect your Xbox controller to your computer using a USB cable and open the Xbox Accessories app. Under the "Controller" tab, you should see the option to update the controller firmware if an update is available.

Use a friend's Xbox console If you have access to a friend or family member's Xbox console, you can try connecting your controller to their console and performing the firmware update from there. Once you've completed the update, you can reconnect the controller to your own console.

If none of the above options are viable, you may consider visiting an authorized Xbox service center. There, trained technicians can help you update the controller firmware using their own equipment.

Great, thank you for your reply.

Did you update the controller on the Xbox console, or did you update it on the PC? The Firmware on the console is much higher than the PC, so the latest Xbox controller firmware update may affect Bluetooth connectivity and performance with some older non-Xbox devices. If your controller is having Bluetooth-related issues after a firmware update, you can choose to revert your controller to an earlier firmware version to correct the problem.

On an Xbox Console:

Press the Xbox button to open the guide, then go to Profile & system > Xbox Assist > Get Help > Help topics > Console & accessories > Controller > My controller has connection issues after the last update. Select Check controller firmware to open the controller firmware reversion screen in the Xbox Accessories app, then follow the instructions in the app.

Once you revert the firmware, try connecting to the PC again and see if it has the same issues.

You can now revert the firmware on a Windows 10 device as well: My Xbox controller has connection issues after the last update | Xbox Support

This sounds like the disconnection issue which is listed in the known issues section of the Xbox system updates since a couple of months. It also affects PC connection no matter if you are using a wireless or wired connection.

If you have an Xbox One console or newer you can downgrade the controller firmware using the pre-installed Xbox Assist app on it. Visit this thread here to find out how.

Unfortunately this does not work with the PC version of the app.

Good luck!