We apologize for the instability of composr.app and appreciate your patience. We are working on the statistics addon and trying to find an optimal way to store and render data. Unfortunately, we have yet to find a solution that can handle the traffic (and therefore, tens of millions of statistical records) of composr.app. We're working hard on one.
Bug in custom code. However I fixed via hardening our internal APIs:
https://github.com/ocproducts/composr/commit/f0446fbf3701e243376b6a4b5bb3d898ca90b886
https://github.com/ocproducts/composr/commit/f0446fbf3701e243376b6a4b5bb3d898ca90b886