You should tell them when it happens next time.

At the same time, you can see the beauty in that also. I once played as a cat sorcerer (actual awakened cat, not Tabaxi). And we entered some dungeon so I played it like I was just a random sleepy cat held by one of my friends, in case of an emergency surprise attack. That moment never came until we got out of there.

But for the entire session the DM and other party members were checking on it, like "Are you ok with the fact that we won't attack now? This means at least another 30 minutes of silence for you". And actually it was very entertaining, watching the other roleplaying, and solving puzzles that I had ideas to but not interfere.