Surface Book 3 - external keyboard and mouse

I am having a few issues and cannot find a solution. I've already checked all drivers, re-installed the OS using a fresh image, completed all my windows updates, run the surface diagnostic toolkit, and run system file checker. This issue happens all the time and my machine cost over $3000.

The laptop frequently freezes and the cursor stops moving/I am not able to use the keyboard for 2-5 seconds each time. When this happens, the screen is still refreshing. For example, my mouse has stopped working multiple time while typing this, but on-screen animations such as the blinking cursor while typing are still moving. I am using a Logitech mouse and keyboard with a USB dongle that worked perfectly with my previous system and still do (I tested over the past week). This issue also happens when I use my laptop's trackpad, so it is not the mouse and keyboard itself that are causing this. I have plugged the USB dongles into both the Surface Dock 2 that is connected to my Surface Book 3 and to the laptop itself. This issue is still happening, so it is not the Surface Dock 2 that is causing this. I have also unplugged the laptop from the Surface Dock 2 with the USB dongles attached to the laptop and this issue is still happening.

The second issue that I am seeing is that, when attached to an external monitor via USB-C to DisplayPort, sometimes my laptop screen stops working while the attached monitor continues to work. For example, about 15 minutes ago my cursor stopped moving on my laptop screen and I assumed that it was frozen because of the first issue I explained above, but when I dragged the cursor to the external monitor it was still working completely fine. Additionally, if I drag something like a browser window from the external monitor to the laptop screen it will not show up until the computer has unfrozen. I have disconnected all peripherals from the laptop and tested this issue is still happening. I have also tried a USB-C to HDMI cable and this issue is still happening. I have also tried an old Surface Dock 1 with a display port to mini display port connection and it is still happening.

The freezing cursor issues (first one explained above) is happening more frequently than the monitor issue, but both are interrupting my productivity and meetings. For example, I could not take myself off of mute when asked a question during a call because my cursor just stopped working all of a sudden (trackpad didn't work either).

I have followed all the standard troubleshooting steps such as: run the Surface Diagnostic tool, install the Surface Book 3 drivers msi package, re-install the OS using a clean image and the Windows 10 media creation tool, make sure that all windows updates are installed, run the Windows 10 system file checker, and monitor the task manager for any processes that are causing spikes in CPU or memory utilization (none were found).

Is anyone else having issues like this? If so, any idea how we can get support without stores being open?

Specs:

Windows 10 Version 2004, i7 1065G7 CPU, 32GB RAM, 1660Ti Max-Q GPU

Possibly related to the mega thread on the mouse freezing in the SB2 section? Some people found the workaround to be adjusting DPI down. I had the issue, with a Microsoft mouse no less. Ridiculous that Microsoft could not fix it with the SB3 and their own mouse doesnt work properly with their own products out-of-the-box.

Forget that, it is better than it was but still occurring.  

David

I now appear to have it working after contacting Microsoft Support.  There is a firmware update for the Dock in the SB3 update https://www.microsoft.com/en-us/download/details.aspx?id=46703 

I also  installed the brightness control and now the screen keeps going to full brightness if I try to adjust the level....ho hum.

David