STEPS TO REPRODUCE:

(1) On Meta Human, select FUZZ part of groom (the facial peach fuzz)

(2) Use Ornatrix Delete brush to delete any of the FUZZ hairs

(3) Upon return to groom mode from Ornatrix edit mode, some of the FUZZ hairs that weren't edited in #2 will be hidden.

NOTE: There was actually a related fix in latest commercial build release, but still here it is an existing issue.

-Tony D