Catch or Nah?

in the UFA game Pittsburgh at Chicago the play in this video was made: [https://www.youtube.com/watch?v=IOmYL6IduyM&t=90s](https://www.youtube.com/watch?v=IOmYL6IduyM&t=90s) Where the player catches the disc, it hits the ground and bounces onto the player's back. It was ruled a catch (or wasn't called a turn at least).

However, watching it initially my thought was that it was down. Watching it frame by frame shows me that the catch was initially made, but the ground forced the disc out of the player's hand. There are 2 frames where it looks like the disc is still in contact with the ground, but not in control of the player.

If the ground forces the disc out of the player's hand is that an automatic turn? or if somehow the disc bounces and is still in the player's hand, then they lose control is it just a normal bobble?