loom ega dos version - game not starting or recognized by scummvm after the use of scummtr and scummrp with the mt32 update needed files

[gabberhead]

i think, i found a bugin scummvm. i am using scummtr and scummrp for editing the german version of loom with the mt-32 update. when i make changes to the game, and import it, scummvm gives an error: gamefiles not found. and the game can also not be added to scummvm again: scummvm can not find a game error. but when i delete the needed files for the mt32 update 82 83 84 85.lfl, the game starts again with the same files and also can be added to scummvm without any problem. but only with ad-lib sound of course.
i tested the same files with dosbox incl the mt32 needed files, the game starts without problems, and also with mt32 music.
the same problem occurs, when i do the same changes to the english version.
first i thought, it is a problem with scummtr or scummrp, but the problem is scummvm itself like it looks.