Hey DOOMenico, Bungie is aware that SIVA Key Fragments are going missing. The possible reason has been discovered, as seen here: https://www.bungie.net/Mobi/en/About/News?id=45653&transparent=true[quote]Siva Key Fragment and Skeleton Key Issues Alongside the Local Network Fireteam Issue, we are actively investigating reports of SIVA Key Fragments or Skeletons Keys being removed from Character Inventory. In many cases, reporting players have stated that this issue occurs more frequently when Characters have a full inventory of Skeleton Keys (5) or SIVA Key Fragments (200).[/quote]Please see here for past details: https://www.bungie.net/en/Forum/Post/213318340/0/0[quote][b]Siva Key Fragments and Cache Keys[/b] We are actively investigating reports of the following: • SIVA Key Fragments or Cache Keys missing from character inventory[/quote][quote]SIVA Cache Keys and Key Fragments Internal investigations continue concerning player reports of SIVA Cache Keys or Key Fragments missing from character inventory. As we troubleshoot these reports, [b]we have noted the following actions that may lead to the loss of SIVA Key Fragments: Players report that this may occur when leaving White Engrams containing SIVA Key Fragments within the game world when returning to Orbit, or turning off a Console. Players report that this may occur when SIVA Key Fragments within the Postmaster are removed, due to Postmaster inventory limits.[/b][/quote]