Html comments are not hidden + you should use them for you feature-specific delimiter

[nicolasmol]

hi

Left: raw md.text
Center: standard VS Code preview (html comments <!-- dsdsdsdsd ->) are not visibles
Right: yours. they are...should not.

AND

This should give you an idea:
From:

:comment[initial_blablabla_text]{#comment-id text="comment_text"}

to:

<!--:comment[-->
initial_blablabla_text
<!--]{#comment-id text="comment_text"}-->