P: Vector tool Gradient Fill angle stuck at 0 degrees on MacOS 10.10 Yosemite

Photoshop CC 2014.2.2 Release. I'm having an issue where any new gradient I create defaults to 0o angle, and cannot be changed. I've tried restarting the computer, restarting Photoshop, purging all cache, and changing graphics settings. Nada.

Steps to reproduce:
• File > New
• 500x500px @ 72ppi, RGB 8 bit with Square pixels
• Select Rectangle tool, draw a box shape on-screen
• In options bar at the top, change fill type to gradient
• Gradient defaults to 0o. Any attempts to change result in the angle immediately resetting back to 0o.
• Attempt to double-click thumbnail preview in layers panel to bring up gradient modal. Changing angle here also does nothing.

This is an issue I've noticed intermittently since CS6. It's not always reproducible, and sometimes the issue goes away on its own.

I work one block away from the Adobe office in SF, happy to come in with my computer to show this in person.