Flex Daily missed a zone

My sprinklers hadn’t run for a couple of days and the soil moisture was low. It ran this morning but completely skipped one zone which was bone dry. How can i figure out why this zone was skipped. When I run the schedule manually, all zones run normally.

Ed

always start troubleshooting of the Flex Daily issues by looking at the soil moisture graphs and tables: What are moisture levels? (Flexible Daily Schedules) (rachio.com).