Flat Dragon fruit?

[John Travis]

I have a Df cutting that seemed normal but as it grew it went from being 3 sided to two sided. I'm not sure if there is an issue, but it looked cool and I wanted to share!

[fyliu]

It's normal. 4 ribbed segments are normal too but it will usually go back to 3 in the next one. It won't stay that way forever. Don't worry about it.