This one took a while to work out.
I was using the InVector third-person controller. I also had a sphere with a trigger collider. No problem.
Of course, there was a problem. The sphere would block the player! Huh? That’s not what triggers do.
To fix it, I changed the layer the sphere was on to ignore raycasts. That worked, but I don’t know why. The InVector docs mentioned us layers for I-don’t-remember-what.