Issue with DO connected to worker incrementally increasing on every execution

can someone take a look at this issue and help us figure out what is wrong? - when we call the water schedule first time, it is working fine every 2 seconds - when we call the water schedule a second time so it is calling 2 times every 2 seconds - when we call the water schedule a third time it is calling 3 times every 2 second - etc... every time, it should call it to run one time every 2 seconds when, i try to get the Alarm so I am getting null in scheduleAlarm