Yep. Buendia, like Bailey, is all about confidence. When things are going well he can look a really useful player but as soon as the mistakes drift in he falls apart. That's the difference between players like them and the likes of Rogers, McGinn and Watkins (and Sancho recently), who also give the ball away cheaply at times but all 3 of them you can trust to keep going and try to make amends.
If you're having a bad day then you at least need to fall back on the basics and do a job, Buendia often goes the other way and starts trying to do ever more complicated things and gets more and more frustrated as things don't go his way.