[Python] APScheduler Jitter Causes Multiple Runs

I a have a job that I want to run once per day at 9am +- 15min. Here is my code:

def Function():
requests.get("https://EXAMPLE.com")
logger.info("Ran function")

sched.add_job(Function, 'cron', hour=9, jitter=900)
sched.start()
try:
while True:
time.sleep(2)
except (KeyboardInterrupt, SystemExit):
sched.shutdown()


Yesterday the function ran at 8:57AM and 9:08AM. Today the function ran at 8:48AM. 8:55AM, and 9:08AM. Why does it keep running more instances with each passing day?

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