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.
Using Chrome Version 48.0.2564.116 (64-bit) on a Chromebook laptop.
Testing on Toshiba laptop using Windows Edge browser and Win 10 confirms the same.
Not sure if this will be picked up, so opening a new issue.
Any bug fixes will be rolled into beta3.