I seem to have found a temporary fix :
I changed the power settings so the monitors never go to sleep and I turn the monitors off when I stop working.
I've done this for three nights now and the task bar still hides and hasn't frozen requiring a restart.
BUT I would still like to see a real fix.
... the next day :
The reason I shut off the monitors is so the glare doesn't disturb the dogs who sleep in the same room overnight. I've left the monitors on all day today and things are OK still. So Microsoft, how about working on this a bit more !?
Don