iPhone IOS 10 Safari JSON parse:error unexpected identifier "function"

iPhone IOS 10 Safari JSON parse:error unexpected identifier "function"

So I’m trying to troubleshoot this error on a client site, that only occurs on IOS 10 on mobile devices. They said it worked prior to upgrading their devices to IOS 10. Reverting back to IOS 9 actually doesn’t produce this error. It appears to be something with JSON.parse along with it being localstorage data (this.local[i])). See below for js error, sample data, and javascript snippet.

Javascript Error:

[Error] SyntaxError: JSON Parse error: Unexpected identifier "function"
parse (Locus.js:40)

Data sample: (this.local)

[{"ObservationID":"444","Username":"blah","Deleted":0,"Flagged":0},
{"ObservationID":"555","Username":"blah","Deleted":0,"Flagged":0}]

Javascript:

Locus.prototype.loadFromLocal = function () {
    if (this.local) {
        for (var i in this.local) {
         var len = ('' + this.local[i]).split('{').length;
         if (len != 1) {
          this.data[i] = JSON.parse(this.local[i]);
         } 
         else {
             if (parseFloat(this.local[i]) == this.local[i]) {
                 /* local storage is a number */
                 this.data[i] = parseFloat(this.local[i]);
             } 
             else 
             {
                 /* already parsed */
                 this.data[i] = this.local[i];
             }
         }
    }
}