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@Gordon
I know. I'm quite surprised about that to be honest - I expected the ceramic antenna to be better than the printed one. You do get much better signal strength I guess.
I know as much about that as you do, but my guess is that Z is vertical, X is in the direction of the writing on the module, and Y is in line with the antenna (as you'd expect that to be pretty symmetrical).
So you get less signal if you're at the button-end of the Puck, since the metal shield blocks it quite a lot.
I'll see if I can reproduce some kind of crash here when using setScan - and you're on the 1v93 firmware?