Oh you can bet for sure that it landed!!

You said the you lost connection from your tablet, but are you sure the RC wasnt still connected?
That is where they can see what happened from the RC data.
IF you lost connection to the RC then RTH kicked in, so it either hovered and landed straight below its last position, or it immediately landed at its last position, or it started home and didnt make it.
Hopefully it stayed connected to the RC longer than you think it did and the smart guys here can narrow down your search area. Also what was the wind like at your flight altitude? that will make a difference too.
ETA; If there was still a connection to the RC, RTH would not kick in till THAT connection was lost. or when you turned off the RC. If there was too much time in between the rC disconnect, you didnt have enough battery left to make the 1000m flight back.
although, at 27% when this happened, I doubt you would have made it back even if it did stay connected.