Tick script stops emitting (running) if no data present

Tl;dr When data from batch comes in as 0 (no data), the tick script stops emitting.

I have this tick script that I want to run every 15 min, that should alert me if my app crashes > 5 times. Problem is, if there are 0 crash events, then the script stops running.

Tick script:

var data = batch
    |query('SELECT sum("value") AS "sum_value" FROM "primary"."autogen"."restarts" WHERE time > now() - 1h AND "pool"=\'nodeweb\' ORDER BY time DESC LIMIT 1')
        // Query 1 hour of restart data from now
        .period(1h)
        // run this query every 15min (every doesn't work?!?)
        // .every(15m)
        // run this cron every 15 min
        .cron('*/15 * * * *')
        // when no data is coming in fill in zero (so the warning levels can reset)
        .fill(0)
        // grouping by time will separate data into buckets. Order by time desc (see query) will ensure that newest data is what is alerted on.
        // LIMIT 1 ensures we have 1 bucket to alert against.
        .groupBy('pool', time(1h))
    // debug logging
    |log()
        .prefix('status-0')
        .level('ERROR')

var trigger = data
    |alert()
        // critical warning if sum_value goes too high
        .crit(lambda: "sum_value" > crit)
        // reset to lower level
        .critReset(lambda: "sum_value" < 10)
        // warn if restarts are more than 5 per hour
        .warn(lambda: "sum_value" > 5)
        // fire on state changes only ('normal' to 'critical' etc), but still fire every 30min
        .stateChangesOnly(30m)
        .message(message)
        .id(idVar)
        .idTag(idTag)
        .messageField(messageField)
        .durationField(durationField)
        // log alert to local log file...
        .log('/tmp/alerts.log')
        .slack()
        .channel('#engineers')

The logs that proves it stops when sum_value=0

ts=2018-01-20T02:45:00.005Z lvl=error msg="begin batch" service=kapacitor task_master=main task=prod_restart_alert node=log2 prefix=status-0 name=restarts group=pool=pnodeweb tag_pool=nodeweb time=2018-01-20T02:00:00Z
ts=2018-01-20T02:45:00.005Z lvl=error msg="batch point" service=kapacitor task_master=main task=prod_restart_alert node=log2 prefix=status-0 name=restarts group=pool=nodeweb tag_pool=nodeweb field_sum_value=2 time=2018-01-20T02:00:00Z
ts=2018-01-20T02:45:00.005Z lvl=error msg="end batch" service=kapacitor task_master=main task=prod_restart_alert node=log2 prefix=status-0 name=restarts group=pool=nodeweb tag_pool=pnodeweb time=2018-01-20T02:00:00Z
ts=2018-01-20T03:00:00.019Z lvl=error msg="begin batch" service=kapacitor task_master=main task=prod_restart_alert node=log2 prefix=status-0 name=restarts group=pool=nodeweb tag_pool=nodeweb time=2018-01-20T02:00:00Z
ts=2018-01-20T03:00:00.020Z lvl=error msg="batch point" service=kapacitor task_master=main task=prod_restart_alert node=log2 prefix=status-0 name=restarts group=pool=nodeweb tag_pool=nodeweb field_sum_value=2 time=2018-01-20T02:00:00Z
ts=2018-01-20T03:00:00.020Z lvl=error msg="end batch" service=kapacitor task_master=main task=prod_restart_alert node=log2 prefix=status-0 name=restarts group=pool=nodeweb tag_pool=nodeweb time=2018-01-20T02:00:00Z
ts=2018-01-20T03:15:00.008Z lvl=error msg="begin batch" service=kapacitor task_master=main task=prod_restart_alert node=log2 prefix=status-0 name=restarts group=pool=nodeweb tag_pool=nodeweb time=2018-01-20T03:00:00Z
ts=2018-01-20T03:15:00.009Z lvl=error msg="batch point" service=kapacitor task_master=main task=prod_restart_alert node=log2 prefix=status-0 name=restarts group=pool=nodeweb tag_pool=nodeweb field_sum_value=0 time=2018-01-20T03:00:00Z
ts=2018-01-20T03:15:00.009Z lvl=error msg="end batch" service=kapacitor task_master=main task=prod_restart_alert node=log2 prefix=status-0 name=restarts group=pool=nodeweb tag_pool=nodeweb time=2018-01-20T03:00:00Z

After this the task stops. No more task logs.

Any thoughts?

I suspect this is related to https://github.com/influxdata/influxdb/issues/6967