flat ocean has structers that sould not be there

if you choose the super flat setting and keep generate sturcters on then do the ocean one. when you spawn in the world it will generate structers that are not suposed to be there. i found this bug when crating random super flat worlds. the sturcters that spawned there was dester temples, jungle temples, igloos and with huts. also runided nether portels do not spawn in the ocean superflat.