https://www.pcgamer.com/you-can-now-100-percent-shadow-of-the-tomb-raider-following-latest-pc-patch/

Interestingly, Shadow of the Tomb Raider launched with a different ending that was patched out on day one. Frustratingly, it also arrived with a bug that prevented some players from achieving 100 percent completion. That's now been fixed universally, as have a number of other issues in the wake of its fourth PC patch. 

Collectable stats are no longer misrepresented in the UI, for example, and Dolby Atmos should now always launch without a hitch. Likewise, a number of "smaller" stability and functionality fixes have been applied; and players using Steam Input will now be shown appropriate icons for all supported controller types—in the same way this is displayed for native input players.