The positive spin on this role is that they can push UI trends in ways UX designers do not. They will break rules but innovate while they do it. Designers in this role love to experiment with new visual styles (turn that drop shadow up to 11!) and while they can sometimes handle designing product from scratch, will greatly excel when working with a seasoned UX designer.
The Archetypes of UX Design
Christian Beck

This is so true, when I was learning foot-steps of UX design and paired up with the UX designer at my company and learned the UX Researcher way I literally transformed my way into both UI/UX designer.
It’s like you have peeked into my life for an instance.

And yeah, I do all of the knitty gritty work of both UI Designer and UX researcher combined, when alone on a project.