I am having a problem very similar to this one in this thread.
Same issue mostly. I am unable to call functions such as GetAllAbilities or anything that uses the Gameplay ability Spec or Gameplay ability spec handles. as it seems that it will not replicate that from an server ai controlled ASC to my player in any way.
I havnt tried GetActiveGameplayEffectsForQuery or GetActiveEffectsWithAllTags yet. these might be the work around I need.