Some years ago we had a very similar bird to the OP near Cuenca (Central Spain), also IDed as Shoveler x Cinnamon Teal. It was discussed in the forum:
https://www.birdforum.net/showthread.php?t=319201&highlight=hybrid+cinnamon+shoveler
https://www.birdforum.net/showthread.php?t=319201&highlight=hybrid+cinnamon+shoveler