As I was reading this thread, my Android 8.0 LG Tracfone notified me that charging just completed. I wouldn't have responded to an iPhone thread, but the alert was too coincidental to refrain.
How extensive are the changes to Hondalink's versions? It would seem that once they get the communications to work properly, changes elsewhere shouldn't affect that. However, I'm not an app programmer, so I don't know how one change elsewhere could affect the communications.
Perhaps they keep tweaking the communications to reduce their costs on this free service. "Look! We can transmit 6 bytes instead of 7 if we just make this one little change...Oops, we should have tested that before making it a required upgrade."