Can't change board size on training.

I made my board smaller for some bullet games and I can't change the board size in training (ik i can obviously do this in other ways). Not sure i'm missing something or if this is something that can be changed?

lichess.org/account/preferences/game-display
Set "Display board resize handle" to always...or navigate to the starting position and the resize handle will appear.

I'd still call it a bug that the resize handle isn't shown on the position the puzzle starts from.