Hello! I have this problem, where when my character jumps and hits the ground, he disappears for a second, for this example I used a knight character, which still shows the cape even when “gone”.
I have no idea what could be causing this, so any help is appreciated!
Nice feature can be for a rogue character “Vanish” 
Joke aside, can you put a video? Provide if there is a logic additinal during jump / end jump or so on (BP / CPP / Ability anything related)
Also can you change jump animation with static Idle something and see if its the same scenario, there could be a wrong root motion at first glance from screen shots.