That indeed sounds strange. As far as I can tell from our logs – there was no erroneous decrease in your quota like the one you described. From what you wrote, it seems like you’re saying that you didn’t make any requests in the specified time period, so it’s unexpected that the remaining quota dropped to 0, is that right?
Our logs show a sudden drop from 2635 to 0 tokens when assigning an issue. This occurred between [11/15/2017 4:34:27.731 PM GMT] - [11/15/2017 4:55:02.730 PM GMT]
If that’s what you’re saying, then our logs indicate otherwise – they indicate that the installation with that ID made lots of requests in that period, so your remaining quota continued to decrease as you made those requests. And after making enough requests – the quota decreased to 0, which is expected.
Is it possible that you have some problem in your logging which is causing you to think that you didn’t make any requests when you actually did? For example, I noticed in our logs that within a period of 1 hour, that installation made more than 1500 requests to https://api.github.com/repositories/49970642, which seems like a lot and also a bit wasteful. Perhaps you’re not tracking these requests correctly?