It stands to reason that they wouldn't do a firmware update without reason. How many people's units might be involved is, of course, unknown.
Seems like that since they have this nice little App why not be able to upgrade firmware via that or release a newer version?
While it hasn't bothered me in use near the end of a second session I will get a message that says something like "Your battery is too cold and needs to be warmed up to continue" Mind you, this is at the end of the session and nothing is cold about the unit. But I just hit "ok", the message goes away and things go on without interruption (continues to run, heat, etc.). As it hasn't manifested itself as a problem in use I haven't been to concerned about it. But if it turns out to be the first step in some other problem that's different, of course. I wonder if that's a firmware issue which is why I wonder about firmware updates.
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