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Curve based rig broken since 2.93
Confirmed, NormalPublic

Description

System Information
Operating system: Windows-8.1-6.3.9600-SP0 64 Bits
Graphics card: GeForce GTX 960/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 368.39

Blender Version
Broken: version: 2.93.2 Release Candidate, branch: master, commit date: 2021-06-23 12:44, hash: rB03d5c8b4edf4
Worked: 2.92
Caused by rBd851fc3ad677: Fix T77330, T81704: Spline IK doesn't preserve bone scale correctly

Short description of error
Curve based rig broken, a few bones start "jumpin", when moving main bone (named "master") far from [0,0,0].

Exact steps for others to reproduce the error
Just move "master" bone in Z direction pasing 360 units, then move any "green" bone (soga_curva_cuelga_1... soga_curva_cuelga_3) and you'll see that bone start jumpin; this worked until 2.92 but since 2.93 it seems is broken now.