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Keyframed group inputs bound to index not property
Confirmed, NormalPublicBUG

Description

System Information
Operating system: Windows 10
Graphics card: GTX 1070 (Laptop)

Blender Version
Broken: 2.80.0 009dbc2bc9fb

Short description of error
Keyframing a property on the group input stack, maintains the keyframe at the stack index rather than the mapped property. This means when the ordering of group inputs is changed the keyframe is maintained at the previous position/index rather than moving with the initial property.

Exact steps for others to reproduce the error
Based on the default startup

  1. Create node group with multiple inputs
  2. Keyframe 2nd property
  3. Push this group input up or down the input stack (while inside node group)
  4. 2nd property will stay keyframed rather than moving up/down stack with the correct property.