Minecarts no longer slow down on soul sand

Updated description by [Mod] GoldenHelmet

Steps to reproduce

1. Place a line of minecart track partly on top of regular blocks and partly on top of soul sand blocks.
2. Send or ride a minecart down the track.

Expected result

When the minecart travels over the soul sand, it slows down.

Actual result

The soul sand has no effect on a minecart travelling above it.

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Original description

On Bedrock 1.16.1 Soul Sand no longer slows down minecarts. I noticed this while riding my rollercoaster