Internal State error, trying to remove location that is still in query

Took me a while to reproduce this on the example, but here's a screenshot:


To reproduce, visit https://geofire.firebaseapp.com/queryBuilder/index.html and create a fish with latlng `34.0489281,-111.09373110000001` then create a query with radius 10000 and latlng `43.92630646953202,127.05690366562499` then update the query with latlng `43.16183777054158,-116.57590883437501` and then revert it back to latlng `43.92630646953202,127.05690366562499` and update it few times and it throws the error:

"Internal State error, trying to remove location that is still in query"

Now my wild guess as to why this happens is that the earth has a diameter of 12742km and so the biggest search radius should be half that. I tried drawing a circle on Google Maps and with the same radius as the query and depending where the center is and how far you're zoomed out you get a sine wave as opposed to a circle, and so I can only guess that when the search radius is too big you end up with an "overlap" or maybe a situation where a key is both in and out of the search circle at the same time. Again, this is only a guess.

I'd love a way to overcome this problem, and my current "solution" is based on my wild guess where I limit the size of the query radius to 6371km (half the diameter of the world to avoid circle overlap).

Reproduce the failure in the GeoFire queryBuilder at https://geofire.firebaseapp.com/queryBuilder/index.html using the coordinates, radius, and repeated query updates from the issue. Trace the query-update path around the “trying to remove location that is still in query” error and determine why the same location is treated as both inside and outside the query; done means the sequence completes without the internal-state error.

Written by the indexing model from the issue text.