During our test we have received force (pressure) values above 1.0 like 1.2 or 1.777...
The API states that values can range from 0....1.

change: function(force, event){
    // this is called every time there is a change in pressure
    // force will always be a value from 0 to 1 on mobile and desktop
  },

The user agent string is:
"Mozilla/5.0 (Linux; Android 9; EML-L29 Build/HUAWEIEML-L29; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/77.0.3865.92 Mobile Safari/537.36"
which would point to Huawei P20.
Unfortunately I do not have more info, since this was only intercepted on our backend, without the access to the device.