Sounds like it. Contact them and see what they say.
I used mine tonight without any transmission issues, but my receiver was in my kitchen only about 10ft away from the KK. One thing that I did notice for the first time tonight, if you use one of the designated "pit probes" for a meat cook, you can't set the alarm for the desired cook temperature, as the lowest allowed setting is above 210F. Just a "work around" as I just didn't set the alarm on that probe and just monitored the temperature directly.