Since updating to beta 4, my option key doesn't work

SInce updating to 10.13.5 beta 4 (17F59b), the neither option key on my keyboard doesn't work in any of my apps. I'm using a Logitech G510 gaming keyboard, with the Alt and Windows keys swapped so that the option and command keys wind up in the expected places.


It's important to note that if I switch them back, the option key works but the command key doesn't, so something about the key located two to the left of the space bar (between Ctrl and Alt) is not working correctly in this beta. It was definitely working since before the beta was installed and I've checked and none of my apps appear to be swiping it somehow.