smooth stone slab now a strange block after convert

so i was trying to convert some old ps4 worlds to the new ps4 bedrock and one world. smooth stone slab already place down turned into a strange dirt block called, tile.info_update.name

here a video i made showing it https://www.youtube.com/watch?v=ne571DSJYQ8

also i check. i load up old editions and pick block and its just normal smooth stone slab but strange block show up after it loading in bedrock