Steps to reproduce:
1- get brewsters pokemon model pack
https://steamhost.cn/steamcommunity_com/sharedfiles/filedetails/?id=826026620

2- boot gm_construct, spawn bellsprout model and t pose it in place

3- With ragdoll tool, manipulate the bone "LtoeA1" and after releasing the mouse the tool soft locks with this unending lua error

[Ragdoll Mover] lua/weapons/gmod_tool/stools/ragdollmover.lua:478: attempt to index field 'rgmOffsetTable' (a nil value)
1. Think - lua/weapons/gmod_tool/stools/ragdollmover.lua:478
2. unknown - gamemodes/sandbox/entities/weapons/gmod_tool/shared.lua:165

Removing the model you can end the solf lock but with many inconsistent results,
like spawing any other model and editing any bone gets the entire thing unfrozen