Twisted Arm on a Third person template UE4 animation

Development Character & Animation
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I’m opening a new UE5 project with the third person template, browsing to the UE4 mannequin animation that’s included with the template and realize that I get this twisted arm issue. Issue consists when retargeting ue4 animations to another skeleton. Is that an IK rig issue? How can this happen in an official template? Would love to get insights as to how the twisted arms can be solved. Thanks!

2

Welcome to the painful world of Gimbal Lock!
Even though is very weird that is happening on a baked animation…
Anyway, you can fix this by driving the lowerarm_twist_01_l procedurally, and you already have an example on how is done with the Control Rig called “CR_Mannequin_Procedural”.

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Thanks for introducing me to gimbal lock. I managed to bypass this issue by retargeting the UE4 mannequin to UE5 manny, then retargeted it to my character successfully.