Operating system: Windows-10-10.0.17763 64 Bits
Graphics card: Intel(R) UHD Graphics 620 Intel 4.5.0 - Build 126.96.36.19972
Broken: version: 2.81 (sub 16), branch: master, commit date: 2019-11-20 14:27, hash: rB26bd5ebd42e3
Short description of error
I have a rig for a human. In blender 2.81 I set IK constraint (chain length 5) on the wrist and when I move it the finger bones follow. I set another on the thumb (chain length 4). Now when I move the wristIK the thumb bones stay where they are, they don’t follow. If I lower the chain length to 3 the thumb bones start to follow the wrist.
Exact steps for others to reproduce the error
Open this file with blender version 2.81a:
Select wristIK and move it around. The bones that are the thumb (finger1-1.R, finger1-2.R, finger1-3.R) doesn't move.
Select finger1-3.R and set chain length to 3. Now when the wristIK is moved around the bones follow.
Open rig_support_blender2_79.blendwith blender version 2.79b. In this blend file the bones follow when wristIK is moved even when chain length is set to 4 for finger1-3.R.
I hope this is a bug and chain length should work the same between the versions. Because this is an animated character and I was hoping to be able to append it in newer blender versions and get the same result. With this behaviour the vertices gets wrong and if I lower the chain length I have to redo everyting.