Windows 11 machine drops connection with 2.5 hours

I have 6 Windows machines on my Tailnet and they have all been working reliably until 2 weeks ago.

There are 2 servers, 2 desktop units and 2 laptops. All machines have Tailscale versions between 1.32.3 and 1.40.0.

After a recent Windows 11 update, one desktop machine drops off the Tailnet within 2 and a half hours of stepping away. I have tried upgrading to the latest version and also removing the machine from the Tailnet and adding it again. I have also set it to Run Unattended but nothing seems to make a difference.

Any help would be appreciated.