So on one of the lines in the sea emperor leviathans page, it says she contacts you when you pick up a blue tablet or enter lava lakes, i got the message “come here, to me” which im pretty sure is the message you get from picking up the blue tablet, however, i never picked it up because i didnt have a purple tablet to open the door, and on my way out of the lost river to go get a purple tablet, i got the message, and i never even entered the lava lakes either.