After taking a break from printing I updated cura and began to notice these striations on my prints that greatly weaken the structure. I thought this was initially due to a blocked nozzle, but they look too organized : like the extruder is intentionally going on and off.

And when I adjusted the extruder position manually from the printer menu the filament came out smooth and consistent. I wondering if this is a setting in cura that is causing this and if so what can I do to fix it.

Thanks.