Using text-variable-anchor removes label

[pbnsilva]

Platform: node
Mapbox SDK version: 5.0.2

I understand this is for a platform that is no longer supported, but I suspect this may be something simple that I am missing.

Steps to trigger behavior

1. Removed all text layers from the style except one;
2. Rendered a tile with and without text-variable-anchor (['center', 'top', 'bottom', 'left', 'right']) .

Expected behavior

Expect that text-variable-anchor has no effect if there's enough space to render the labels. So the labels are rendered.

Actual behavior

Using this style.
Without text-variable-anchor the label gets rendered (top). With it, it does not (bottom). See the label San Francisco (code):

Code

const mbgl = require('@mapbox/mapbox-gl-native')
const request = require('request')
const utils = require('./utils')
const config = require('./config')
const sharp = require('sharp')
const readline = require('readline')
const fs = require('fs')

var tile1 = {
  zoom: 11.2,
  width: 4099,
  height: 4099,
  pxWidth: 931,
  pxHeight: 931,
  center: [ -121.892441, 37.638385],
  bearing: 0,
  pitch: 0,
  ratio: 0.2271310075628202
}

renderTile('tile1', tile1)

function mapRequest(req, callback) {
  var url = req.url
  if (url.indexOf('access_token') === -1) {
    var urlObject = utils.parseURL(url)
    url = utils.makeAPIURL(urlObject, config.ACCESS_TOKEN)
  }

  makeRequest(url, callback)
}

function makeRequest(url, callback) {
  request({
    url: url,
    encoding: null,
    gzip: true
  }, function (err, res, body) {
    if (err) {
      callback(err)
    } else if (res.statusCode == 200) {
      var response = {}

      if (res.headers.modified) { response.modified = new Date(res.headers.modified) }
      if (res.headers.expires) { response.expires = new Date(res.headers.expires) }
      if (res.headers.etag) { response.etag = res.headers.etag }

      response.data = body

      callback(null, response)
    } else {
      callback(new Error(JSON.parse(body).message))
    }
  })
}

function renderTile(name, tile) {
  var options = {
    request: mapRequest,
    ratio: tile.ratio,
    mode: 'tile'
  }
  var map = new mbgl.Map(options)

  map.load(require('./style.json'))

  map.render({
    zoom: tile.zoom,
    width: tile.width,
    height:  tile.height,
    center: tile.center,
    bearing: 0,
    pitch: 0,
  }, function(err, buffer) {
      if (err) {
        throw err
      }

      map.release()

      var image = sharp(buffer, {
          raw: {
              width: tile.pxWidth,
              height: tile.pxHeight,
              channels: 4
          }
      })

      image.toFile(name + '.png', function(err) {
          if (err) {
            throw err
          }
      })
  })
}