At my home course you can join their "Player Development" program for $49 bucks a month. This includes unlimited range balls and unlimited play on their three practice holes. Too good a deal to pass up.
Success. It was software. I think maybe I upgraded 3 successive OSes. Normally I do a clean wipe but I got lazy. Or maybe it’s some confluence of settings. Whatever. I got a new keys, which have more rise than the old ones. Plus a new battery. I guess it was worth the trouble.