>I've run into the MacOS one mentioned, getting a black screen on opening the lid.

this is similar to what happens to me, if the screen goes dark to save battery and I move it to start back up too quickly, like within a couple of seconds, it will crash and restart.

So sometimes I see it is going to go dark and I move to stop it but it goes dark a microsecond before I touch the touchpad and then everything needs to start up again.