Board Thread:Episode Discussions/@comment-25319479-20170920093317/@comment-25122992-20170924132717

I've read the chapter, but it wasn't actually stated that Kurama disturbed Naruto's chakra control, but rather that the massive chakra reserves of Naruto that partially come from Kurama made it harder to control this chakra. So, the conclusion is that Naruto's chakra control is still naturally poor, but the amounts of chakra that were increased through Kurama's influence made it worse.