Minecarts do not go slow underwater

Snapshot 20w45a added waterlogged rails to Java Edition, a feature which has always existed in Bedrock (MCPE-32561). However, it also made minecarts move more slowly underwater than on land. In Bedrock Edition minecarts move at the same speed on water and land.

Steps to reproduce

1. Load Water Cart Test.mcworld
2. Press the wooden button.

Expected result

The cart that passes through water slows down and/or doesn't go as far as the cart that does not pass through water.

Actual result

The carts move at the same speed throughout and go the same distance.

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mine cars do not go slow underwater