What kind of cucumbers are they. I had a gynoecious cucumber and it produced a lot of flowers but half of them were male and dropped off. I did get n4 cucumber then the rest were stung by fruit flies. I tried bagging, but maybe I bagged them too late. I pulled the vines. I am also spraying my host plants and setting up more fruit fly bait. I usually get 11 cucumber from Diva and Suyo long. They are parthenocarpic. I usually don't have fruit fly problems, but hey, maybe my luck ran out. I usually do have fruit fly traps out, but the new bait doesn't seem to work as well as the old one. I may have to put more traps out.
Fruit from squash cukes are usually pollinated by (squash bees) sweat bees not honey bees, although honey bees will as well. Pollination may not be the issue if you have so many bees. The young fruit can be stung and that is usually the problem here. When the fruit is stung very young, it will turn yellow and die, older fruit survive and you just cut out the bad part and it is still edible. Bagging works but needs to be applied soon after pollination and it has to be sealed well enough that the fruit fly cannot sting the fruit. it is tedious to do, but sometimes necessary to protect squash and melons.
Happy gardening in Hawaii. Gardens are where people grow.