I lost my diamond flight trail from season 8

Hey @Kakizuki,

Season 8 dive trails would no longer be appearing for anyone now that we're into Season 11, sorry.

Back in Season 4, dive trails were updated with the intent they would just remain on the account for the season after they were earned. There was a bug that prevented this from happening which was recently fixed.

At this point the only dive trails would be from last season, or Ranked Series 1 and 2 (Season 2 and 3) if you earned those. 

This update was mentioned in the patch notes at the beginning of the season, but has just made it into the game with the latest patch, apologies for the confusion.