i have just updated my game to the bedrock edition on the ps4 and the shulker boxes have disappeared from the chests that they were placed in.

I found a work around if you load up the old version and remove all the shulkers from the chests and place in world. after that convert to new world and the shulkers and the contents will be available 

They did the same thing in my world. I managed to lose around 3/10 of my resources. So thanks Bedrock dev team for obviously not doing your job when it came to testing your work so that all of the bugs that are present in the new PS4 edition would be fixed. Really, the amount of game breaking bugs in the release is unacceptable.

Philip Kerr- That's not going to work for people because worlds over a certain size won't work anymore on the old version.

This should be resolved in the latest 1.14 version that went out on PS4 only - please note that the world may need reconverting from PS4 edition to Bedrock in order for the shulker box items to transfer over to Bedrock.