There is no cycle soak for drip emitter systems.
For shrubs, I’m not surprised at all with the watering times. My perennials that are on drip (root depth set to 7 in) go for a little more than an hour. I have the nozzle set to .2 which seems to work well for my 1/2 GPH emitters. Another zone that I have set with a root depth of 9 inches goes for 1 hour and 40 minutes (again with the same nozzle setting). My guess is that your root depth is even deeper.
It sounds like you are using the default nozzle setting for emitters — this doesn’t work well for most of us with drip emitters that are at each plant. Take a look at Drip Emitter Calculator for Precipitation Rate & Area for a good way to figure out the best way to set up your zone for the shrubs.
Setting a custom nozzle is pretty simple. In the zone, just go to advanced, and you can set the inches per hour for the nozzle there.
Other than the cycle soak comment, I agree with what @chrisandeden said.