Azure function app (python) on a timer_trigger didn't trigger as expected (no new deployment)

Question

(regarding the image, the errors aren't relevant for this case, that's something on our end)
We have a function app running on a timer_trigger in python and for some reason it didn't trigger on it's own on the 15th and 16th at 3UTC (5CET) as it would be expected and I can't seem to see any logs that tell me why that is.

Example of how the function is defined:

@app.function_name(name="function_name")
@app.timer_trigger(arg_name="timer", schedule="0 0 3 * * *", type="timer", run_on_startup=False)
def run_my_function(timer: func.TimerRequest) -> None:
   logging.info(f"function executed at: {datetime.datetime.now()}")

When I look across the function app as a whole there are several other functions that have been working just fine in the same timeframe and there was no deployment between the 14th (after it worked) and 17th (where it triggered again). So the entire 15th(no auto trigger), 16th(no auto trigger) and 17th(triggered automatically as it should) have run on the same deployment.