**System Information**
Operating system: Windows-10-10.0.18362 64 Bits
Graphics card: GeForce GTX 1080/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 430.86
**Blender Version**
Broken: version: 2.81 (sub 3), branch: master, commit date: 2019-08-22 20:40, hash: `rB1de7717ed711`
Worked: 2.79b
**Short description of error**
Baking actions / NLA is broken in Blender 2.8-2.81
**Exact steps for others to reproduce the error**
* First, in order to verify it works as expected in Blender 2.79b, open the attached blend file in Blender 2.79b. It contains one bone with a simple base action + a tweak action in additive mode on top, in the NLA editor.
{F7695920}
* Spacebar > "bake" > NLA Bake > check "Visual Keying" and OK
* Baked fine, one keyframe per frame, when muting the base action, the animation is preserved.
* Now, repeat the same process in Blender 2.8/2.81
* Baking went wrong, there are only two keyframes at the start and end of the frame range, and when muting the base action, the animation is screwed up.