I've got a very similar problem:
Create a character in CC3+ - I used the standard/default female, replaced underwear with the (free) white dress and added prime hairstyle elements 08_ bang, base and ponytail.
I renamed the materials for the hair elements so that each would have a unique material name.
Nothing else was changed.
When I hit Play in Unreal, the hair base look OK but the bangs and ponytail are not touching her head correctly. See screenshots.
Have I done something wrong or is this a bug?
Is there a workaround?
CC3 version 3.41.4008.1