When a magma block elevator is switched to soulsand, when travelling upwards the character starts to bob/shake.

Expected result
The character moves upwards quickly without any bobbing

Actual result
The character starts bobbing after going halfway up

How to reproduce the bug
Long magma block elevator, switch the magma block with soulsand (I used a redstone contraption )
Travel through the elevator.

Affects gameplay as these 2 way elevators are very common in bases.