Usually, entities slide for 4 blocks by pushing them with slime block.

What I expected to happen was...:

 In 1.14.4 and above, entities slide for 5 blocks on slime block with 3 to 8 layers of snow (or other blocks like stone)

What actually happened was...:
 But in 19w45b, entities slide on 5 blocks on a slime block and 3 to 5 layers of snow.

Steps to Reproduce:

• Place an armor stand on a line of slime block (5-6) with snow layers (or not)
• Push the armor stand with slime block
• The distance traveled depend on the layers of snow and on the version

Edit 1.16 pre-release 5: an armor stand on a slime block and 2 layers of snow is at the same level than with a slime block (contrary to 19w45b when it travel only 3 blocks)

Edit 1.16 pre-release 6: with 1 or 2 layers of snow, the armor stand travel one block less than default and with 3 to 5 it travel 1 more.