Dunno,but I doubt it. From what you say, openHAB and influxDB must share the same system clock.
That makes an “extra” record being written - or rather, getting timestamped - a few seconds before the expected time really odd.
I’m making an assumption that we would expect cron persist like -
everyDayAt2358 : “0 58 23 * * ?”
to trigger a write record at (or after) second 00, as specified.in the cron.
Yes,let’s find out if there is a double write request (surely must be, somewhere!?/)