Minecart behaves erratically when traveling over powered rails

Short description of the issue:
Minecarts behave abnormally and become impossible to ride.

Steps to reproduce the issue:

1. Enter Creative Mode.

2. Build a minecart track/ride.

3. Place a minecart on the powered rails rails.

4. Try to test and ride the minecart.

Expected result:
The minecart should move normally on the powered rails and allow the player to ride it.

Actual result:
The minecart starts behaving erratically ("goes crazy") and I am unable to ride it.