message: Failing to mark queued tiles as such.
diff: @@ -637,8 +637,9 @@ export class IModelTileLoader extends TileLoader {
  public async loadTileContents(missingTiles: MissingNodes): Promise<void> {
  for (const tile of missingTiles.extractArray()) {
  + tile.setIsQueued();
  this._iModel.tiles.getTileContent(tile.root.constructTileId(tile.id)).then((content: string) => {
  - if (tile.isLoading)
  + if (tile.isQueued)
  this.loadGraphics(tile, content);
  }).catch((_err: any) => {
  tile.setNotFound();
  