Value box backgrounds disappeared

Question

I have a mixed chart with value boxes with top-out placement. On all except the first value, the background color has disappeared from the value box. This was previously working fine in that the white background showed up behind all value boxes, and there have been no changes to the code so I'm at a loss as to why the background color suddenly disappeared. Below is my code showing the issue. Any help or direction on how to fix this would be greatly appreciated.

var maxYValue = 60;
var value1 = 40;
var value2 = 15;
var value3 = 34;
var value4 = 14;
var value5 = 20;
var zones = {
    "type": "mixed",
    "font-family": "proxima_nova_rgregular",
    "title": {
        "text": "MINUTES IN ZONES",
        "font-family": "proxima_nova_rgregular",
        "background-color": "none",
        "font-color": "#39393d",
        "font-size": "22px",
        "adjustLayout": true
    },
    "plot": {
        "borderRadius": "5px 5px 0 0",
        "bar-width": '50%',
        "animation": {
            "delay": 300,
            "effect": 11,
            "speed": "500",
            "method": "0",
            "sequence": "3",
            "z-index": 2
        },
        "value-box": {
            "placement": "top-out",
            "text": "%v",
            "decimals": 0,
            "font-color": "#35353b",
            "font-size": "14px",
            "alpha": 1,
            "background-color": "#ffffff",
            "padding": "5px 5px 0px 5px",
            "shadow": false,
            "z-index": 4
        }
    },
    "plotarea": {
        "border-left": "3px solid #39393d",
        "border-bottom": "3px solid #39393d",
        "padding-left": "3px",
        "margin": "dynamic",
        "background-color": "none"
    },
    "tooltip": {
        "visible": false
    },
    "scale-x": {
        "placement": "opposite",
        "labels":["Zone 1","Zone 2","Zone 3","Zone 4","Zone 5"],
        "line-width": 0,
        "tick": {
            "visible": false
        },
        "guide": {
            "visible": false
        },
        "item": {
            "offsetY": 25,
            "font-size": 12,
            "fontColor": 'black',
            "bold": true
        },
    },
    "scale-y": {
        "offsetEnd": 45,
        "max-value": maxYValue,
        "visible": false,
        "line-width": 0,
        "guide": {
            "visible": false
        }
    },
    "series": [
        {
            "type": "bar",
            "values": [
                value1, value2, value3, value4, value5
            ],
            "background-color": "#cdcccc",
            "z-index": 2,
            "styles": ['#cdcccc', '#71cbdc', '#8cc541', '#d96c27', '#ea2629']
        },
        {
            "type": "line",
            "line-color": "gray",
            "marker": {
                "backgroundColor":"white",
                "borderWidth": 2,
                "border-color": "#35353b",
                "visible": false,
                "rules":[
                    {
                        "rule":" %node-index%3 == 1 ",
                        "visible": true,
                        "size": 7,
                        "offset-y": -15
                    }
                ]

            },
            "value-box": {
                "visible": 0
            },
            "values": [
                [0, value1 + 2],
                [0, maxYValue],
                [0, null],
                [1, value2 + 2],
                [1, maxYValue],
                [1, null],
                [2, value3 + 2],
                [2, maxYValue],
                [2, null],
                [3, value4 + 2],
                [3, maxYValue],
                [3, null],
                [4, value5 + 2],
                [4, maxYValue],
                [4, null],
            ]
        }
    ]
}
zingchart.render({
    id : 'zones',
    data : zones,
    height: "320",
    width: "100%",
    output : 'canvas'
});

<script src="https://cdn.zingchart.com/2.5.2/zingchart.min.js"></script>
<div class="ctabprcci-chart zone-chart" id="zones"></div>

Answer 1

Jeff on the ZingChart team here.

It seems like this issue is only happening when your chart output is set to 'canvas' in the render method. If you set output to 'svg' fixes the problem. I am not sure if this is something you have recently changed or not. It seems like this persists across our older builds as well.

We can put in a ticket internally to check to see why this issue is happening with canvas.

Thanks,