water/lava cannot be removed in adventuremode

when placing water/lava on a block in adventuremode, with the CanPlaceOn list
you are unable to remove the water/lava you placed!
I expected buckets which had the water/lava to have the ability to pickup the water/lava in adventuremode, or at least remember the blocks it could be placed on

Note:
previously you could pick up the water/lava if you used a empty bucket with canPlaceOn, and then useing it on the block touching the water/lava
now this no longer works