By chance did you hit the dash button in the lower console or is something leaning against it? This switch disables the hatch from opening by the buttons?WELL, liftgate is doing the same thing again. I can open it by poking the manual release. at one point while doing this I heard the latch motors activating. still no action on the RKE button or the dash button.
I watched a youtube video of someone who said theirs was fixed by putting the key into ACC position and then holding the RKE trunk button for 5s. Didn't seem to do it for me.
I'll see how it feels after it sits overnight. Always seems to happen when it's freezing cold out and I've got some bulky items I need to get out of the back!