HALO 3 SUBTITLES NOT WORKING IN GAME-CUTSCENES

I’ve noticed a lot of players on reddit r/halo and me are experiencing problems with the subtitles in halo 3 campaign. The subtitles no longer load since halo 4 arrived on PC. When I played it back in July, the subtitles were working fine and I could enjoy it. But now the subtitles are gone. Not to mention no “gameplay subtitles” haven’t been added yet. Pease add it back 343!!!