[iggy1]

Which cp streamer do you use? You will probably need air checkpoints. (RaceCheckpoints) check the link Look at the "type" parameter.
https://sampwiki.blast.hk/wiki/SetPlayerRaceCheckpoint

EDIT: Although im not sure if they work on foot (never tested). If thats the case consider using a pickup..... or wait for someone with a better solution. I've never seen normal checkpoints in the air before.