If Darth Vader could use his telekinetic Force powers to pull back a ship in flight (and additionally pull it apart), he could've used that ability during other necessary times throughout the films. (e.g. in 'The Empire Strikes Back' when the Millennium Falcon is taking off from Hoth as he was walking towards it to capture the heroes).
In the training flashback where Obi-Wan and Anakin duel, Anakin has both of his human arms, indicating it must take place before Star Wars. Episodio II: El ataque de los clones (2002). Anakin was 19 years old in Attack of the Clones - and 22 years old in Star Wars. Episodio III: La venganza de los sith (2005) - yet in the newly-filmed flashbacks, despite the CGI de-aging, he still looks older than 19.
At one point during the flashback to Anakin and Obi-Wan sparring with their lightsabers, the blue glow of Anakin's lightsaber is reflected on his face but not his neck or clothes.