Unclear why job executes multiple times

Describe the bug Setting a cron job to run at ~4pm everyday but the job runs multiple times as the logs show.

To Reproduce

code

_job_defaults = {
    "coalesce": True,  # Trigger only one job to make up for missed jobs.
    "max_instances": 1,  # Allow only one execution of a job per time.
}

local_scheduler: BackgroundScheduler = BackgroundScheduler(
    jobstores={
        "default": job_store,
    },
    executors={
        "default": ThreadPoolExecutor(),
    },
    timezone=_timezone,
    job_defaults=_job_defaults,
)

@local_scheduler.scheduled_job(
    # assuming trader runs in PDT timezone
    name="notify.daily.report",
    trigger=CronTrigger(
        day_of_week="mon-fri",
        hour="16",
        jitter=120,
    ),
)
def my_func()
   ...

Logs:

Expected behavior Job should only run once ~4 pm.

[agronholm]

You are not using the latest version. Please upgrade and see if the error persists.

[agronholm]

The improved jitter feature in v4.0.0a1 eliminates jitter as the cause of such issues.