I don't know when this problem with the clock has started, I've owned KPA only since last may. The first time I wrote about it was October 14th.
[Hidden Feature] Display time on Remote's screen
I remember noticing the problem some time earlier. I have to say that I can't remember if the clock was working properly with the FW that my KPA came with.
And you are right, I should have opened a ticket as soon as I noticed the problem.