That happened to me when a leaf/branch got partially detouched from the main stem, and it started rooting like when you take them off for propagation.

That's the only reason I can think of as well. Was the plant bumped, maybe by an pet or yourself?

Thanks guys. I dont recall it suffering any trauma....but i'll keep an eye on it to see how it goes :)

Thanks so much Rina_Ontario. Maybe i can use pruners to detach it and pot it up :)

You could just gently twist it off (probably better than cutting off with pruners in this case, you want to keep all the roots if possible) - but don't have to remove it at all. Can you post a photo of whole plant?

Winnie

Very nice plant. If you decide to remove the offset and pot it up, you'll have more...Rina

THANK YOU! :) so many of my plants have died under my care...but for some reason, this one is doing well :)