Slime block elevator bug

Couldn’t find duplicate of this issue, but i have seen this issue on forums so I apologize if this is a reundant issue.  My question is, when creating a simple slime block eleveator, a 2x2 or a 4x4 elevator, the observer’s and sticky pistons do not seem to jive, they go up a couple of blocks and go up and down getting stuck and does not work properly.  Is this an issue that can or could be fixed in the next update. Would love to add a slime block elevator to my world on pS4 and iPad.  Thanks in advance.