Haha I experienced this in Cap Marvel's #8 or #9 trial. They show an Instant Air Dash upwards but nowhere in the inputs is that mentioned. It's just assumed if you watch you'll understand you somehow need to "rejump" higher in the airMy favorite is the Captain America Mission Mode #10.
Nowhere in the actual tutorial does the game teach you to do DUD jumps. They don't even teach you that you can do a DUD jump off of a launcher to hit enemies closer to the ground after the launcher.
Then they ask you to do EXACTLY that with Cap's Mission 10. It's a combo that requires the short hop and most player who don't know that you have to do a DUD jump would just quit.
Capcom honestly hasn't learned shit.