Been testing it with a friend and any time one of us uses Orengall and has a dog summoned the other person will randomly have their game freeze until you force-quit. Sometimes it happens after 2 minutes, sometimes we can play upwards of an hour before it happens.
Whoever is the host is who's been using Orengall so it might be a client only issue, but we haven't tried with the client using Orengall yet. Will do that later and write results in here