MapMode::Tile truncated labels

[demiantres]

When using MapMode::Tile (or MapMode::Raster) for creating map tiles, then text is sometimes truncated along tile borders:

Code:

std::unique_ptr<mbgl::HeadlessFrontend> frontend;
std::unique_ptr<mbgl::Map> map;

int tileSize = 512;
float pixelRatio = 2.0;
Size s(tileSize/pixelRatio, tileSize/pixelRatio);
auto mapTilerConfiguration = TileServerOptions::DefaultConfiguration();
frontend.reset(new HeadlessFrontend(s, pixelRatio));
			
map.reset(new Map(
	*frontend,
	*this,
	MapOptions().withMapMode(MapMode::Tile).withSize(s).withPixelRatio(m_pixelRatio),
	ResourceOptions()
		.withTileServerOptions(mapTilerConfiguration)));
map->getStyle().loadURL("maptiler streets v2");


BoundingBox bb; // the bounding box of the tile
auto bounds = mbgl::LatLngBounds::hull(LatLng(bb.getMinLatitude(), bb.getMinLongitude()),
									   LatLng(bb.getMaxLatitude(), bb.getMaxLongitude()));

auto cameraOptions = map->cameraForLatLngBounds(bounds, mbgl::EdgeInsets());
map->jumpTo(cameraOptions);
auto image = m_frontend->render(*map);