I have an updated controller and since installed I have had the same issue. Doesn't matter if it's iPhone or Samsung, I can no longer control the grill temps. I even lost range and can only get 30ft away before losing connection. I haven't contacted support in regards to this issue yet. Been just over a month since I installed controller.
Unfortunately, most everyone. I get great results with the smoker ... but not without the babysitting I was hoping to reduce. The controller may or may not change the temp when commanded, which makes it useless. There is so much potential with the controller, but I'm afraid PB has contracted development to a third party and has not taken the ownership of the quality or user experience. It's a sad state of affairs.