【v5】堆叠条形图 `label` 提示丢失 #5336

正常：

异常：

图例取消只剩一个后，label丢失

配置代码：

/**
 * A recreation of this demo: https://nivo.rocks/storybook/?path=/docs/bar--diverging-stacked
 */
import { Chart } from '@antv/g2';

const chart = new Chart({
  container: 'container',
  theme: 'classic',
  paddingLeft: 40,
});

chart
  .interval()
  .data({
    type: 'fetch',
    value: 'https://assets.antv.antgroup.com/g2/nivo-gain-lost.json',
    transform: [
      {
        type: 'fold',
        fields: [
          'lost > 100$',
          'lost <= 100$',
          'gained <= 100$',
          'gained > 100$',
        ],
      },
    ],
  })
  .transform([{ type: 'stackY' }])
  .encode('x', 'user')
  .encode('y', 'value')
  .encode('color', 'key')
  .scale('x', { padding: 0.2 })
  .scale('y', { domainMin: -100, domainMax: 100 })
  .scale('color', {
    domain: ['lost > 100$', 'lost <= 100$', 'gained <= 100$', 'gained > 100$'],
    range: ['#97e3d5', '#61cdbb', '#e25c3b', '#f47560'],
  })
  .legend('color', { title: false })
  .label({
    text: 'value',
    position: 'inside',
    formatter: (v) => (v ? `${v}%` : ''),
    transform: [{ type: 'overlapDodgeY' }],
    style: {
      fill: '#000',
      fontSize: 10,
    },
  })
  .axis('y', {
    position: 'right',
    title: false,
    labelFormatter: (v) => `${v}%`,
  })
  .style('radius', 10)
  .interaction('tooltip', {
    shared: true
  })

chart
  .lineY()
  .data([0])
  .style('lineWidth', 2)
  .style('stroke', '#e25c3b')
  .style('strokeOpacity', 1);

chart.call(titleLeft, '75%', 'lost', '#61cdbb');
chart.call(titleLeft, '20%', 'gain', '#e25c3b');

function titleLeft(node, y, text, fill) {
  node
    .text()
    .style('x', -10)
    .style('y', y)
    .style('text', text)
    .style('fontWeight', 'bold')
    .style('dy', -10)
    .style('transform', 'rotate(-90)')
    .style('fill', fill);
}

chart.render();