I was not teasing. I'm a beginner, just like you. And I experienced this, just like you. I did use the "no nostrils glow" prop at the time. This is something you can download that stops light coming out the nsitrils. My guess is that it can be built in some models, and isn't really "attached" to the nostrils. Anyhow, I was able to select them and delete them. Never ever saw this happen again. So no, no teasing meant. (that is not my style). I only had a little time, and if your answer had been "yes", the solution would have been there at your hand. I'll try to reconstruct the case asap.

I have tried prudent planning long enough. From now I'll be mad. (Rumi)