There have been reports of a throttle issue with the Airbus, which testers confirmed. However, since it's a Saturday afternoon, the devs and Mathijs are unfortunately not available to provide a quick fix. Therefore I disabled the 1.2.1.1 update for both, the A318/A319 and the A320/A321 products on the update server for now.   If you already updated, the only way to revert to the previous version is to uninstall the product and then reinstall the last download from your shop account.