Update:
By replicating UKismetMathLibrary::NotEqual_ClassClass, I was able to breakpoint the function, determining that the RHS (B) is not set.
bool UKismetMathLibrary::NotEqual_ClassClass(class UClass* A, class UClass* B)
{
return A != B;
}
Still unsure as to where the issue is originating from. Any help would be appreciated.