Spikes... forgive me if this is too basic, but are you deleting your history on those models frequently? I usually see UVs go haywire like that when an object has an extensive construction history. Shading/ripples... This looks like a clipping issue on your perspective camera. Go to view > select camera in your perspective…
Can you post a screenshot of the issue next time it occurs? At my workplace we saw a strange bug in maya 2015 yesterday where after cutting a mesh an unselectable vertex jumped to a spiky position somewhere of the model. I am curious if this is the same issue ( if it is i still got no solution sorry ^^ ) Or if it looks…
Most likely hardware or drivers, I had similar issues on a normal mesh on a different machine last year. If you can't test newer drivers (or even old ones), you can also try using a different viewport renderer.
I've just completely reinstalled the graphics drivers with the latest version, clean install. Made sure Maya was updated to the latest version + had only just reinstalled it as well. Changed the Viewport renderer to Dx11, tried the legacy viewport but it didn't seem to improve anything. I guess all I can do is keep trying…