This is caused by the twist bones, which are specific to the UE4 skeleton. Simply remove the names of the twist bones when retargeting and all will be well. Look at this questions and last answer.
Mixamo to UE4 skeleton problem.
This is caused by the twist bones, which are specific to the UE4 skeleton. Simply remove the names of the twist bones when retargeting and all will be well. Look at this questions and last answer.
Mixamo to UE4 skeleton problem.