Subnautica - 73220 The claw fragment still confuses players. Greyed out 0/20 Prawn Suit in the PDA.

Picking up the PDA from the video will grey out the Prawn Suit blueprint with 0/20. It shouldn't be an issue to unlock as they are two different counters, but it is still confusing.
The reason it displays 0/20 is because the claw arm fragment could previously be scanned.
You would need 20 fragments to unlock the Prawn Suit itself.
This was a problem because they only are 7 in every playthrough. So it wasn't possible to unlock the Prawn Suit that way, therefore the possibility was removed and the claw can no longer be scanned.
The game still has different counters for it and that's the reason of the bug.