OK, cheers. The only other thing I can see that’s different between 71 and 68 is that you set an explicit (empty) offValue for 68, but not 71. It would be strange if openHAB was choking on this, but may be worth a try.
Just be wary that openHAB sometimes doesn’t load a saved Things file properly, hence my question about restarting. The other option to force proper loading is to do this.
What do the logs say when your Things file is saved? Any complaints?