Board Thread:Theories and Speculation/@comment-33959444-20180610211826/@comment-734582-20180610212940

It&#039;s Not Johnny wrote: And yes, Obito didn't know Kakashi used Kamui on it, but that just makes it even more stupid since the dude literally had a Sharingan, Rinnegan, and was the original user of Kamui. So, what gives? Obito was busy fighting a 4-on-1. He was already keeping track of their abilities and positions. Neither Sharingan nor Rinnegan gives 360 vision or X_ray vision, so he's gonna miss some things. Especially since a number of rocks and dust clouds were flying around obscuring his vision.

Obito's not omniscient, and it was made clear in that fight that he wasn't exactly given a lot of time to digest what was happening. For instance, he though Naruto's clone simply disappeared in stead of being transported. Kakashi had also mastered Kamui to a high degree, matching Obito in a sense. He was fast enough that he could teleport low-mass objects (like kunai or clones) within a fraction of a second.

So no, it's not a plot hole.