I work for a printing company, and we see this sort of glitch a lot. We also see it in the same design over multiple different systems so this must be an Illustrator issue rather than a compatibility problem with our graphics cards.

When rendering with the GPU, fill colors will extend out past the shape bounds. When we switch to render with the CPU, the glitch disappears. See the example attached.

This is a problem for us. We are losing production time because our printers on the floor see this and assume its an error with the artwork and flags it as such.

System info:
Windows 10 64bit
CPU: Intel(R) Xeon(R) CPU E5-1620 v3 @ 3.50GHz, 3501 Mhz, 4 Core(s), 8 Logical Processor(s)
GPU: NVIDIA Quadro P2000
32GB RAM