Assistance with line and triangles appearance in middle, layer time?

Hello everyone,

Pardon me if I need to include something else or posting incorrectly as it’s my first time posting from mobile app.

I have what appears to be a line and triangles forming on the angles of this model I’m trying to print. It’s about a dozen sides with equal angles forming a sort of tapered tube. I had to scale and cut this into 3 parts due to the size needing to be 24" end result. The top part is the one having the issue where the bottom 2 printed great. After looking through each of the preview options it appears the layer time drastically changes is where or near the area I’m having issues with. I’ve read others talk about cooling but I’m unsure if that is the issue and how to fix. I’ve printed the top part twice with same results but the 2 good parts were printed in between each other to rule out any snagging or filament issue. I’ve only adjusted settings specific to silk bc they wanted it to appear metal like and this filament is great. Has anyone seen this before or have any advice? I’ll include pics from all parts and from Bambu for visual.

Using Bambu studio, x1c+AMS, .4mm nozzle, .2 layer height.

Just an update I change layer height to .16 and the triangles actually moved further down…even stranger.