New Prime, several crashes

[Cristian Arezzini]

Hello all,
I just bought another Prime after my first one was bricked beyond hope during a firmware update (as reported elsewhere). This time I bought the "Wifi-enabled" hardware version.
I haven't spent much time with it yet; I immediately upgraded the firmware to the latest version; but while playing with the Advanced Graphing app, I had several crashes - the calculator would just suddenly switch off, and when switched on it would show the "long" boot screen. And all changes since the last "successful" power off would be lost.
Specifically, every single time it crashed, I was editing and modifying the "7 segment squares series" demo graph - I would touch the text area to change something in the equation, and it would switch off. It's not repeatable: doing the exact same thing would not crash it again, but doing something else that used to work before, would.

I don't remember such crashes in my previous unit, but I hadn't upgraded that one. Should I worry? I don't want to think that I got two faulty units out of two.

Cristian