The name of the tag #lava_pool_stone_replaceables is misleading, because it contains blocks that stone cannot replace in lava pools. It is also inconsistent with the #features_cannot_replace tag. Shouldn't it be named #lava_pool_stone_cannot_replace?
This report was based on this video by slicedlime, in which he said the tag has the wrong name. I know it's not an official source, but can we please leave this open for Mojang to decide?