Touchscreens on EOS freeze

I've seen my CIA freeze on my EOS, so I have to use a mouse instead.  Recently I've noticed both entire touch screens on the EOS freeze.  Then magically unfreeze while the touch screens on my back-up EOS freeze.  Has anyone seen such a thing?  Usually I can reboot the console and that gives me the touch screens back, but this time they came back on their own, then crashed the screens on the connected back-up console. 

Any ideas?

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