Hi David, You may have a new version of the app available. Check for an update in your app store. My phone was updated to 3.0.15 a couple days ago. Have you had any better success with 3.0.15?
Which Bhyve device are you using? Do any of the zones water from your controller or is it one specific zone? Does the controller give a fault error on the display? Check that the each zone wire and the ground are connected fully.
Hi Tarpon65, Aarronj, Does the product still water even though the rain delay is enabled? What does the display on the Bhyve device say? Also, what app version are you each using?