The new blender release (hash: 936014ea8c74), seems to have disabled constraints from animations.
Easiest way to reproduce:
- Open the default room.
- Place the cube at (0, 0, 5)
- Add “Active” rigid body to the cube
- Add “Limit Location” object constraint and check minimum Z = 0
- Press play
In previous versions, the cube would drop and stop at z = 0, but now it falls to -infinity.