Chunk problem on the Nitendo Switch since last update

Dear Mojang team
I play on the Switch and there the chunks are not loaded my whole world is broken and I assume that it is in the experimental setting, the 0 height is currently at height 82. And I use the world type Flat and everything I have built has completely disappeared up to height 82. Dear Mojang team I ask you to fix the error and restore the worlds.
MFG. Chrisi1710 and WahrerTapsi129