[Bug] 在渐变面积图中，tooltip 条目上的 shape 没有区分分组渐变色

[kkxxkk2019]

Version

latest

Link to Minimal Reproduction

none

Steps to Reproduce

{
        "type": "area",
        "data": {
          "values": [
            {
              "month": "1月",
              "kit": "套件1",
              "sales": 8
            },
            {
              "month": "1月",
              "kit": "套件2",
              "sales": 10
            },
            {
              "month": "2月",
              "kit": "套件1",
              "sales": 11
            },
            {
              "month": "2月",
              "kit": "套件2",
              "sales": 12
            },
            {
              "month": "3月",
              "kit": "套件1",
              "sales": 13
            },
            {
              "month": "3月",
              "kit": "套件2",
              "sales": 14
            },
            {
              "month": "4月",
              "kit": "套件1",
              "sales": 11
            },
            {
              "month": "4月",
              "kit": "套件2",
              "sales": 12
            },
            {
              "month": "5月",
              "kit": "套件1",
              "sales": 20
            },
            {
              "month": "5月",
              "kit": "套件2",
              "sales": 21
            },
            {
              "month": "6月",
              "kit": "套件1",
              "sales": 11
            },
            {
              "month": "6月",
              "kit": "套件2",
              "sales": 22
            },
            {
              "month": "7月",
              "kit": "套件1",
              "sales": 23
            },
            {
              "month": "7月",
              "kit": "套件2",
              "sales": 18
            },
            {
              "month": "8月",
              "kit": "套件1",
              "sales": 30
            },
            {
              "month": "8月",
              "kit": "套件2",
              "sales": 33
            },
            {
              "month": "9月",
              "kit": "套件1",
              "sales": 23
            },
            {
              "month": "9月",
              "kit": "套件2",
              "sales": 18
            },
            {
              "month": "10月",
              "kit": "套件1",
              "sales": 30
            },
            {
              "month": "10月",
              "kit": "套件2",
              "sales": 33
            }
          ]
        },
        "xField": "month",
        "yField": "sales",
        "seriesField": "kit",
        "point": {
          "style": {
            "size": 0
          },
          "state": {
            "dimension_hover": {
              "size": 10,
              "lineWidth": 0
            }
          }
        },
        "area": {
          "style": {
            "fill": {
              "gradient": "linear",
              "x0": 0.5,
              "y0": 0,
              "x1": 0.5,
              "y1": 1,
              "stops": [
                {
                  "offset": 0,
                  "opacity": 1
                },
                {
                  "offset": 1,
                  "opacity": 0.2
                }
              ]
            }
          }
        },
        "axes": [
          {
            "orient": "left",
            "label": {
              "inside": true,
              "space": 0,
              "style": {
                "textBaseline": "top",
                "dy": 4,
                "fontSize": 12,
                "fill": "#8F959E"
              }
            },
            "grid": {
              "style": {
                "lineDash": [0, 0]
              }
            },
            "title": {
              "visible": true,
              "position": "start",
              "autoRotate": false,
              "text": "单位",
              "space": 0,
              "style": {
                "textAlign": "start",
                "dy": -12,
                "lineHeight": 12,
                "fill": "#8F959E"
              }
            }
          },
          {
            "orient": "bottom",
            "maxHeight": 60,
            "tick": {
              "visible": false,
              "tickSize": 4,
              "style": {
                "lineWidth": 1,
                "stroke": "#dee0e3",
                "strokeOpacity": 1
              }
            },
            "paddingOuter": 1.5,
            "sampling": false,
            "label": {
              "autoRotate": true,
              "autoRotateAngle": [0, 5, 10, 15, 20, 30, 45],
              "autoLimit": true,
              "autoHide": true,
              "autoHideSeparation": 8,
              "style": {
                "fontSize": 12
              }
            }
          }
        ],
        "padding": {
          "top": 0,
          "left": 0,
          "right": 0,
          "bottom": 0
        },
        "legends": {
          "visible": true,
          "orient": "top",
          "position": "start",
          "maxRow": 1,
          "padding": {
            "top": 0,
            "right": 0,
            "left": 0,
            "bottom": 30
          }
        },
        "label": {
          "visible": false
        },
        "crosshair": {
          "xField": {
            "visible": true,
            "label": {
              "visible": false
            }
          }
        },
        "theme": {
          "component": {
            "discreteLegend": {
              "pager": {
                "padding": {
                  "left": 0,
                  "right": 0,
                  "top": 0,
                  "bottom": 0
                }
              }
            }
          },
          "colorScheme": {
            "default": {
              "dataScheme": [
                {
                  "maxDomainLength": 15,
                  "scheme": [
                    "#3370EB",
                    "#25B2E5",
                    "#17CFB5",
                    "#0EAD97",
                    "#9E73EB",
                    "#8A5BDE",
                    "#B791FA",
                    "#51C3F0",
                    "#1099CC",
                    "#09917F",
                    "#51BA43",
                    "#419E34",
                    "#8FB4FF",
                    "#528CFF",
                    "#2353B6"
                  ]
                }
              ]
            }
          }
        }
      }

Current Behavior

Expected Behavior

同对应面积的颜色

Environment

- OS:
- Browser:
- Framework:

Any additional comments?

No response