Went to get an inspection sticker today. Figured I'd test the hazard lights before going to make sure I didn't have any bulbs out, and when I pressed the button it pushed into the faceplate. I was able to fix it by disassembling the faceplate and then wedging some rolled up shop towel behind the button and the metal back plate. It seems to be a poor design with just two plastic pedestals that the button screws into that had snapped off. At least I found the problem before I left rather than the inspector discovering it.