Original Subnautica invisible on TrueAchievements?

So, first post here

I was looking through my game collection and checking which were my most played games and I noticed that the original Subnautica that I played for something 75 hours wasn't in the correct spot on the list.

When I searched for the game, it turned out that it wasn't even in my entire collection! And it is a game that I have 100% in! I thought that it was some weird glitch so I played it yesterday and it shows up in my Xbox profile but it still doesn't show up here.

Has this happened to someone else as well?

You've set the title as "not owned". If you uncheck the filter box that says "Exclude not owned" the game shows up.