I have an MX Keys and MX Master 3 connected to my laptop and am running Windows 10. I haven't had any Bluetooth problems for a while but yesterday it stopped working consistently. Instead, it works for a few minutes or seconds, then stops. It does this repeatedly. Even when it is not working, Windows Bluetooth window shows the devices connected. I restarted the computer, and even removed the devices from Bluetooth and reconnected them. I also checked and the laptop is not set to fast start. Still have the problem. An odd feature of the problem s that when I open up the Bluetooth and other devices window in setting, that sometime cause the Bluetooth to reconnect, although only for a couple of seconds.
I did a Windows a few days ago, and it seems like the problem started thereafter. I tried removing the Windows updates, but one of them cannot be removed (Servicing Stack 10.0.19041.4351). I don't KNOW whether the update cause the issue. Any suggestions?