Problem of VGMTools,
Because there is not a VGMTools topic, I post it here
Edited by Tom: moved this post to a new topic (it was in the MAME topic). It is fine if you create a new topic to report a bug or to ask for help.
There is vgm where a sound disappears when I use vgm_trim
example 1:
Edit: link was removed.
Sega MegaCD/SegaCD - Cosmic Fantasy Stories - Opening
Before use :01 Opening.vgm
After use :01 Opening_trimmed.vgm
Some sounds become the silence.
example 2:
Edit: link was removed.
Turbo CD/PC Engine CD-ROM - Nobunaga no Yabou - Bushou Fuuunroku - Opening
Before use:op.vgm
After use

p_trimmed.vgm
It becomes the long silence.
vgm which I edited in reference to txt which I output in vgm2txt
op_vgm2txtopt.vgm
In this place, a sound is played.
Will it be correctable?