What version of Local Server?
You mentioned this happened after a Windows 10 update... did you mean updating to Windows 10, or you already had 10, and there was just a patch?
Is you Local Server installed ON the PC that is running Windows 10? or on something else like an RPi, etc?
When this issue is happening, is your NodeMCU plugged in with USB and using the IDE monitor, or are you using some other method of seeing the Serial Prints.
And again... can we see this sketch you are testing with?