That is really weird. You should stay on the ground when You spawn, unless You glitched through the scenery.
Do You mind sharing a replay with us or the moderators?
View this thread on how to export it: How to manage your replays
And then please post to https://sharemyinfiniteflight.com/ and share the link. If You encountered a glitch, the violations can be reversed, however moderators need the replay I believe.