[BUG]行政区域图-Choropleth，地图类型为mapbox时设置pitch倾角，地图初始化部分被遮挡，自适应无效

[zss7819]

import { Choropleth } from '@antv/l7plot';

fetch(`https://gw.alipayobjects.com/os/alisis/geo-data-v0.1.2/administrative-data/area-list.json`)
  .then((response) => response.json())
  .then((list) => {
    const data = list
      .filter(({ level }) => level === 'province')
      .map((item) => Object.assign({}, item, { value: Math.random() * 5000 }));

    const cityData = list
      .filter(({ level }) => level === 'city')
      .map((item) => Object.assign({}, item, { value: Math.random() * 2000 }));

    const districtData = list
      .filter(({ level }) => level === 'district')
      .map((item) => Object.assign({}, item, { value: Math.random() * 1000 }));

    new Choropleth('container', {
      map: {
        //type: 'amap',
        type: 'mapbox',
        style: 'blank',
        center: [120.19382669582967, 30.258134],
        zoom: 3,
        pitch: 20,
      },
      source: {
        data: data,
        joinBy: {
          sourceField: 'adcode',
          geoField: 'adcode',
        },
      },
      viewLevel: {
        level: 'country',
        adcode: 100000,
      },
      autoFit: true,
      drill: {
        steps: ['province', 'city'],
        triggerUp: 'unclick',
        triggerDown: 'click',
        onDown: (from, to, callback) => {
          const { adcode, level, granularity } = to;
          // 如果是浙江省，禁止下钻
          if (adcode === 330000) {
            return;
          }

          if (granularity === 'city') {
            callback({
              source: { data: cityData, joinBy: { sourceField: 'adcode' } },
            });
          } else if (granularity === 'district') {
            callback({
              source: { data: districtData, joinBy: { sourceField: 'adcode' } },
            });
          }
        },
        onUp: (from, to, callback) => {
          callback();
        },
      },
      color: {
        field: 'value',
        value: ['#B8E1FF', '#7DAAFF', '#3D76DD', '#0047A5', '#001D70'],
        scale: { type: 'quantize' },
      },
      style: {
        opacity: 1,
        stroke: '#ccc',
        lineWidth: 0.6,
        lineOpacity: 1,
      },
      label: {
        visible: true,
        field: 'name',
        style: {
          fill: '#000',
          opacity: 0.8,
          fontSize: 10,
          stroke: '#fff',
          strokeWidth: 1.5,
          textAllowOverlap: false,
          padding: [5, 5],
        },
      },
      state: {
        active: { stroke: 'black', lineWidth: 1 },
      },
      tooltip: {
        items: ['name', 'adcode', 'value'],
      },
      zoom: {
        position: 'bottomright',
      },
      legend: {
        position: 'bottomleft',
      },
    });
  });

[lvisei]

看上去是 OK 的，问题和图文描述清楚