Actually here’s one way to reproduce what I was talking about.
Take the empty board, play a couple (2 or 3 even) of moves that aren’t in the database.
Use the back arrow to go back to the empty board.
Try playing out the 3-3 invasion joseki.
It’s like you’re permanently in experiment mode from then on, even though sometimes it shows you a move or two that should be in the database - until you hit reset that is.
(I feel like it used to happen to me too not on the empty board but I’m still trying to see if I can reproduce that)