Yes. Aphids and Mites are the two most prominent pests.
The ladybugs are likely there to feast on teh latter.
Commercial yards comprise of acres of plants. Likely with all manner of insect inhabitants. And yet, commerical hops get used for all manner of hopping charges.
So, why then do homegrowers freak so easily when they see a bug on their hops.
Rinse the hops daily to keep bugs at bay. Pluck the flowers and dry them. Use them as you would a store bought variety. Just knowing that you may have to do a batch or two to get the bittering just right.