Duplicate video track on Blade Runner - Final Cut

[Nocturnal]

First time MakeMKV user here, so maybe I did something wrong. In any case, I made an mkv of UltraHD/HDR Bluray of Blade Runner - Final Cut, and while this worked just fine, I now have two nearly identical mkvs. They have

• The same audio tracks
• The same video stream
• The same chapters
• The same subtitles

And while they seem almost identical, they are not bitwise identical some bytes differ all over the place, and one is a single byte (yes, a single byte) larger than the other.

Is this a bug? Why would there be the same video twice? Or is this something "broken" like the even frames in one stream and the odd ones in the other?