influxdb 1.8.9 fails to load via systemctl script on existing DB

Steps to reproduce:
List the minimal actions needed to reproduce the behavior.

1. stop the DB with systemctl stop influxdb
2. start the DB with systemctl start influxdb

Expected behavior:
Database starting

Actual behavior:
Database fails to start with
"Failed to reach influxdb http endpoint at http://localhost:8086/health"
error
running
"/usr/lib/influxdb/scripts/influxd-systemd-start.sh"
script manually fails with same error. however database starts and connectable via http.
curl http://localhost:8086/health
{"checks":[],"message":"ready for queries and writes","name":"influxdb","status":"pass","version":"1.8.9"}
possibly due to loading shards time.

Environment info:

• System info: Run uname -srm and copy the output here
  Linux 4.15.0-154-generic x86_64
• InfluxDB version: Run influxd version and copy the output here
  InfluxDB v1.8.9 (git: 1.8 d9b56321d579)
• Other relevant environment details: Container runtime, disk info, etc
  DB is about 250 GB

Logs:
Include snippet of errors in log.
nfluxd-systemd-start.sh[17616]: Failed to reach influxdb http endpoint at http://localhost:8086/health
systemd[1]: influxdb.service: Control process exited, code=exited status=1

Start with /usr/lib/influxdb/scripts/influxd-systemd-start.sh and reproduce the failure using systemctl stop influxdb followed by systemctl start influxdb. Check how the script probes http://localhost:8086/health while the existing 250 GB database loads. Done means an existing InfluxDB 1.8.9 database starts successfully through systemd without the health-check control process failing.