Horizontally pushed slime blocks deal suffocation damage and don't launch players if they are at the edge of the block

Steps to reproduce:

Place obsidian on the ground and 2 slime blocks on top of it.

Place a piston horizontally so that it pushes the slime blocks and a lever to activate it.

Go to the edge of the block where the slime block gets pushed to and pull the lever.

You can also elevate the slime blocks by one block, but then you need to jump to them so that the crawling mode doesn’t cancel the damage.

Expected result:

You get launched horizontally away from the slime block without getting dealt damage.

Actual result:

You only get moved like if the slime block was a normal block and get dealt damage. The reason why you don’t get launched seems to be the damage, as in creative the setup works perfectly.