Broken: 2.79 5bd8ac9
Short description of error
When IK influence change, ik animation have 1 frame delay
And this delay will be exported
Exact steps for others to reproduce the error
1.The IK Bone influence is driver from another bone
and on the first NLA or frame influence is 0.
2.Hold Alt and scrolling mouse wheel move to next frame.Or press Right Arrow Key move to next frame.The IK target moved and IK Bone have not change.
3.Export FBX with NLA
5.Error blender file and fbx