MakeMKV video playback issue

[Night457]

Sometimes I have VideoTS folders or DVD ISOs and I convert them to MKV format with MakeMKV. This is because I can play MKVs on my BluRay Player > TV setup.

The DVD files play back decently on my computer and also fast-forward or rewind without issue. But sometimes fast-forwarding or rewinding though the MKV makes a mess of unviewable digital blocks. I have to guess if I fast-moved to the correct spot.

If MakeMKV makes a 1:1 copy, why this difference in playback? Is there a better way of making a 1:1 copy so that the MKV result is not worse in the playback ability? I still am trying to avoid the several hours involved in recoding the disk using Handbrake, XMediaRecode or the like.