Displacement node adds unwanted spikes When I add a displacement node, regardless of whether the input is noise / image, every time I subdivide the surface to get more geometry (whether through direct subdivide or the subdivide surface modifier), unwanted spikes appear.
Here is the sphere without subdividing and an example noise displacement setup.

Here is the same sphere and node setup but with a subdivide surface modifier.
This is apparently an AMD GPU problem.  Similar issues have been found apparently.  My condolences to anyone else out there on Team Red.
https://developer.blender.org/T77095
https://devtalk.blender.org/t/blender-2-83-crashing-on-amd-gpu/13641
Thanks to Rich and Christopher for the speedy and helpful replies!