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One of four edited hair systems won't simulate unless edit is deleted
Confirmed, NormalPublic


System Information
Operating system: Win10
Graphics card: GTC 1060

Blender Version
Broken: 2.92.0 master 2021-02-24 16:25 02948a2cab44 and 2.93.0, master 2021-06-02 11:21 84da05a8b806
Worked: Didn't find a working version

Short description of error
4 particle systems, one ("Back") won't sim unless the edit is deleted. It stays in place and stretches towards the animated head cap.

Attempted things to fix it:
Delete all bakes and resim - failed
Checked the weight painting - doesn't seem to be the source of the issue
Append into new files and resim - failed
Disabled dynamics - now everything moves with the haircap, but obviously no sim
Removed hair edit - now it works but I loose the edit

Exact steps for others to reproduce the error
Open the file and press space to run the sim and animation. I would not know how to make a sim from scratch which won't work though so I'm sending the file.