Panning is not proper when the chart is place inside futureBuilder widget Completed

import 'dart:async';

import 'package:flutter/material.dart';
import 'package:intl/intl.dart';
import 'package:syncfusion_flutter_charts/charts.dart';

void main() {
  runApp(MaterialApp(
    home: TestPage(),
  ));
}

class TestPage extends StatefulWidget {
  @override
  _TestPageState createState() => _TestPageState();
}

class _TestPageState extends State<TestPage> {
  Future future;

  @override
  void initState() {
    super.initState();
    future = Future.delayed(Duration(seconds: 1));
  }

  @override
  Widget build(BuildContext context) {
    print('build SensorPage');
    return Scaffold(
      appBar: AppBar(),
      body: LayoutBuilder(
        builder: (_, lwb) {
          print('build SensorPage.LayoutBuilder');
          return Column(
            children: [
              Container(
                height: lwb.maxHeight / 2,
                color: Colors.red,
              ),
              Container(
                height: lwb.maxHeight / 2,
                child: FutureBuilder(
                  future: future,
                  builder: (_, AsyncSnapshot asyncSnapshot) {
                    print('build SensorPage.LayoutBuilder.FutureBuilder');
                    if (asyncSnapshot.connectionState == ConnectionState.done)
                      return SfCartesianChart(
                        series: [
                          LineSeries<Datum, DateTime>(
                            dataSource: [
                              Datum(DateTime(2020, 7, 1), 3),
                              Datum(DateTime(2020, 7, 2), 1),
                              Datum(DateTime(2020, 7, 3), 4),
                              Datum(DateTime(2020, 7, 4), 8),
                              Datum(DateTime(2020, 7, 5), 5),
                              Datum(DateTime(2020, 7, 6), 1),
                              Datum(DateTime(2020, 7, 7), 3),
                              Datum(DateTime(2020, 7, 8), 7),
                              Datum(DateTime(2020, 7, 9), 2),
                            ],
                            xValueMapper: (Datum datum, _) => datum.x,
                            yValueMapper: (Datum datum, _) => datum.y,
                            markerSettings: MarkerSettings(
                              isVisible: true,
                            ),
                          ),
                        ],
                        primaryXAxis: DateTimeAxis(
                          dateFormat: DateFormat.Md().add_Hm(),
                        ),
                        primaryYAxis: NumericAxis(
                          labelFormat: '{value} mm',
                        ),
                        tooltipBehavior: TooltipBehavior(
                          enable: true,
                          shouldAlwaysShow: true,
                        ),
                        zoomPanBehavior: ZoomPanBehavior(
                          enablePanning: true,
                          enablePinching: true,
                          zoomMode: ZoomMode.x,
                        ),
                        onActualRangeChanged: (rangeChangedArgs) => print("visibleMax = ${rangeChangedArgs.visibleMax}"),
                      );
                    else
                      return Center(
                        child: CircularProgressIndicator(),
                      );
                  },
                ),
              )
            ],
          );
        },
      ),
    );
  }
}

class Datum {
  DateTime x;
  num y;

  Datum(this.x, this.y);
}

════════ Exception caught by gesture library ═══════════════════════════════════════════════════════

The following assertion was thrown while dispatching a pointer event:

Failed assertion: boolean expression must not be null

When the exception was thrown, this was the stack:

#0 _ContainerArea._performPointerUp (package:syncfusion_flutter_charts/src/chart/base/chart_base.dart:2193:31)

#1 _ContainerArea._getListener. (package:syncfusion_flutter_charts/src/chart/base/chart_base.dart:2631:11)

#2 RenderPointerListener.handleEvent (package:flutter/src/rendering/proxy_box.dart:2620:25)

#3 GestureBinding.dispatchEvent (package:flutter/src/gestures/binding.dart:198:22)

#4 GestureBinding._handlePointerEvent (package:flutter/src/gestures/binding.dart:156:7)

...

Event: PointerUpEvent#85188(position: Offset(169.3, 512.3))

  position: Offset(169.3, 512.3)

Target: RenderPointerListener#e58d8 relayoutBoundary=up1

  parentData: not positioned; offset=Offset(0.0, 0.0) (can use size)

  constraints: BoxConstraints(0.0<=w<=340.0, 0.0<=h<=260.0)

  size: Size(340.0, 260.0)

  behavior: deferToChild

  listeners: down, move, up, signal

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