[5e OGL] NPC whisper rolls not working

Hi, I have this problem that no npc can roll as a whisper to me, the DM, I tried activating "always roll", "toggle whisper" with To GM but it's always seen by all. The query whisper doesn't even show up. This npc is a goblin monster from mines of phandelver, it comes from another campagn with the same character sheet, I have the statbloc and everything is working but not the whisper option. Any ideas?

Hi Loupaile, I'm going to copy this post over the the thread dedicated to problems with the 5eOGL sheet , for higher visibility by mods and users. Since you can follow it there, I'll go ahead and close this thread.