Some digital files only contain one of the three endings. If your subtitles suddenly go out of sync at the 80-minute mark, you likely have a file meant for a different ending.
The biggest challenge with Clue subtitles is the finale. Originally, theaters showed different endings to different audiences. On home media, you usually have two options: Clue 1985 Subtitles
"Even if you were right, that would be one plus one plus two plus one, not one plus two plus one plus one." Some digital files only contain one of the three endings
"I’m not shouting! All right, I am! I’m shouting! I’m shouting! I’m shou—" [Thud] Conclusion Clue 1985 Subtitles