Auto-editor does not retain subtitles anymore

[Flopsey]

Source video contains subtitles:

$ auto-editor info CD-20251022.mp4
CD-20251022.mp4:
 - recommendedTimebase: 25/1
 - video:
   - track 0:
     - codec: h264
     - fps: 25
     - resolution: 1920x1080
     - aspect ratio: 16:9
     - pixel aspect ratio: 1
     - duration: 4601.72
     - pix fmt: yuv420p
     - timebase: 1/12800
     - bitrate: 606244
 - audio:
   - track 0:
     - codec: aac
     - layout: stereo
     - samplerate: 48000
     - duration: 4601.557
     - bitrate: 128931
 - subtitle:
   - track 0:
     - codec: mov_text
     - bitrate: 98
 - container:
   - duration: 4601.719999999999
   - bitrate: 741463

But the resulting video after running auto-editor without any extra options (apart from --no-open) does not contain the subtitles anymore:

$ auto-editor info CD-20251022_ALTERED.mp4
CD-20251022_ALTERED.mp4:
 - recommendedTimebase: 25/1
 - video:
   - track 0:
     - codec: h264
     - fps: 25
     - resolution: 1920x1080
     - aspect ratio: 16:9
     - pixel aspect ratio: 1
     - duration: 3577.56
     - pix fmt: yuv420p
     - timebase: 1/12800
     - bitrate: 579987
 - audio:
   - track 0:
     - codec: aac
     - layout: stereo
     - samplerate: 48000
     - duration: 3577.56
     - bitrate: 128970
 - container:
   - duration: 3577.56
   - bitrate: 714489

$ auto-editor --version
29.0.0

[Flopsey]

Same thing also happens with the resources/mov_text.mp4 in this repo.