Just for clarification, did you start out in water before doing the race? The pitch issue doesn’t go away until you dismount on land then remount on land.
If you had mounted up in a puddle prior, flew to the race to start, you’d have the issue there as well.
This isn’t really anything tech can do, it’s more of a bug. I encourage you to add your post to an ongoing bug report thread. Especially if you are getting it more than just the water take off scenario, the info could prove helpful in getting a fix.