Naruto doesn't have the beasts within himself...
From what it looks like naruto did what obito did, and that is sticking his hand in madara and getting some chakra from son goku himself. He doesn't have son goku in him...
Just because all the beasts were inside naruto during the meeting with the sage, it's like when minato or Kushina or even the sage himself met with naruto, it doesn't mean they are physically inside them, just their chakra are.
From what it looks like naruto did what obito did, and that is sticking his hand in madara and getting some chakra from son goku himself. He doesn't have son goku in him...
Just because all the beasts were inside naruto during the meeting with the sage, it's like when minato or Kushina or even the sage himself met with naruto, it doesn't mean they are physically inside them, just their chakra are.