Levers don't work on glowstones to turn them off and on. This happens both in a realm I'm on and in two of my own worlds. I have glowstones in the ceiling with levers for on and off switches. The switches are merely cosmetic, since I leave the lights on all the time, but it is a very noticeable glitch.

The glowstone on the right is one I just placed (after having been blown up by one of the creepers that keep spawning in my well-lit home, but that's an entirely different glitch), and the lever "light switch" has no effect on it. The one on the left was placed before the "Glitchy Together" update and works as it should.