Rate limit exceeded keeps failing in production

This conversation is linked to this one: https://www.geni.com/discussions/204253

It really looks there is some problem with the Rate limit. I am using access token to call geni API so (ref https://www.geni.com/platform/developer/help/rate_limits?version=1), it should support 40 requests per 10 seconds, so, the limit is 1 request each 0.25 seconds.

I have created an small script in python to test the proble. Essentially, I created this piece of code for running the url calls:

data = None
continue_iteration = True
i=1
while continue_iteration:
print(i,datetime.datetime.now())
data = requests.get(url)
i += 1
value_error = data.json().get("error", {}).get("message", None)
if not ( value_error and ("Rate limit exceeded." in value_error) ): continue_iteration = False

So, my expectatino of output is that all print outs will start with 1, given that the difference between the first call and the next is at least 0.25 seconds.

But this is the result I get:

1 2019-12-07 13:37:34.182276
1 2019-12-07 13:37:35.331122
1 2019-12-07 13:37:36.359418
1 2019-12-07 13:37:36.967325
1 2019-12-07 13:37:37.889597
1 2019-12-07 13:37:38.284527
1 2019-12-07 13:37:38.916835
1 2019-12-07 13:37:39.313022
1 2019-12-07 13:37:40.463302
1 2019-12-07 13:37:40.960288
1 2019-12-07 13:37:41.983683
2 2019-12-07 13:37:42.503397
3 2019-12-07 13:37:43.007764
4 2019-12-07 13:37:43.394448
5 2019-12-07 13:37:43.785502
6 2019-12-07 13:37:44.544111
1 2019-12-07 13:37:45.574507
1 2019-12-07 13:37:45.942273
1 2019-12-07 13:37:47.104166
1 2019-12-07 13:37:48.133591
1 2019-12-07 13:37:48.641903
1 2019-12-07 13:37:49.041802
1 2019-12-07 13:37:49.465901
1 2019-12-07 13:37:50.178529
1 2019-12-07 13:37:50.441913
1 2019-12-07 13:37:50.785818
2 2019-12-07 13:37:51.199413
3 2019-12-07 13:37:51.712037
4 2019-12-07 13:37:52.095940
5 2019-12-07 13:37:52.429748
6 2019-12-07 13:37:52.745671
7 2019-12-07 13:37:53.150062
8 2019-12-07 13:37:53.759839
9 2019-12-07 13:37:54.271167
1 2019-12-07 13:37:54.634139
1 2019-12-07 13:37:55.298050

As you can see, it gives an error of Rate Limit around 10 calls (not always 10), notice that all the calls are done between 0.4-1 second, so below the 0.25 limit