I found that when using slime blocks to bounce entities(I used primed TNT),you can only bounce them for about 5 blocks instead of 6-7 blocks in previous versions and Java Edition.You can see in the test world I uploded.The huge tower made by obsidian is my elevator that worked fine in 1.13 but dosen't work now.

I used 1.16.100.59 for test but 1.16.40 also have this.

It break my elevator and tunnelbore machine.

May be related to the imcomplete fix of MCPE-62419.