Chart not consistently showing data

[martheli]

I have the following function to create and display chart:

    func setChart(chartview: BarChartView, xarray: [String], yarray: [Double]){
        
       
        var dataEntries: [BarChartDataEntry] = []
        
        
        for i in 0..<xarray.count {
            
            let dataEntry = BarChartDataEntry(x: Double(i), y: Double(yarray[i]))
            
            dataEntries.append(dataEntry)
        }
        
        
        
        let chartDataSet = BarChartDataSet(values: dataEntries, label: "")
        
        let chartData = BarChartData(dataSet: chartDataSet)
        
        chartview.xAxis.valueFormatter = IndexAxisValueFormatter(values:xarray)
        
        chartview.xAxis.labelPosition = .bottom
        
        chartview.chartDescription?.enabled = false
        
        chartview.rightAxis.enabled = false
        
        chartview.legend.enabled = false
        
        chartview.data = chartData
    
    }

And then I have two Views with two charts like this:

setChart(chartview: barChartView, xarray: countArray, yarray: doubleArray)
            
setChart(chartview: barChartView2, xarray: agversionarray, yarray: doubleArray2)

Sometimes the chart looks good like this:

But other times the chart X-Axis has two many values or is missing values like this:

I also printed out my X and Y array when the graph looks weird and they are as follows:

Graph 1

["iOS 10", "iOS 9"]
[193.0, 3.0]

Graph 2

["2.1.0.6", "2.1.0.5", "2.0.32", "2.0.30", "2.0.23"]
[173.0, 3.0, 15.0, 4.0, 1.0]

The data looks fine, not sure why its being formatted like that.