I can get only one subtitle from the DVD

[bucht]

there are several subtitles in the DVD, I select them all. but when the MKV file is output, I can see only one subtitle.
I tried many times with different disks and this problem always happen.
It is version1.8.10. Previous versions didn't have such problem.
why? is it some kind of function limitation for unregistered users?

[Woodstock]

Please turn on debug logging (explained in the FAQ linked in my signature) and post the log from the rip.

MakeMKV will REMOVE subtitle tracks that turn out to be empty, which may be what you are seeing.

[bucht]

Oh I found the problem... the output file is totally correct. It's the player's problem. I tried another player software and found those subtitles.