[2.8] YMVST plugin issue

Hello all,
new to Renoise, just testing for the moment. I use trackers (Protracker, AHX on amiga)

my question here is about YMVST plugin.
I load the plugin, it produce a clean sound; I have downloaded a bunch of presets
I tried to load some , but when I play a sound, it’s still the same sound that plays, although in the plugin window, I see the preset has been correctly loaded.

Is it a bug, or I do something the wrong way ?

Thanks for your help