I started up the machine, I opened up a pattern I was working on, tweaked a bit, decided to reload with [FUNC] + [Pattern] and then silence, the entire pattern parts clear, emptied. Is this normal? this function needs to be used ONLY after the Temp Save function?
Apologies if this was obvious in the manual, it wasn’t clear to me.
Anyways, maybe this could warn others from doing the same mistake.
My guess is your pattern wasn’t saved in the project after you created it in the first place. So the status the pattern returned to when hitting [FUNC] + [Pattern] was still the empty pattern you started with
You need to save it first.
got it, understood that it wasn’t saved. What I found weird is: I turned it on and the pattern was there as I left it, so I thought this meant it was “saved”. I guess I learned the lesson. Thanks everyone! 
When the device is properly powered down, it will keep the last state of the project that was last loaded. This last state and the last saved state can be different so it’s important to always save as you go along just in case.