I Saw the Movie Toy Story

You know what is one major plot hole about this movie that no one ever talks about? If Buzz actually believed that he was the real Buzz Lightyear, why did he always go into inanimate toy mode whenever Andy or other humans were around? Especially with Sid! He had no qualms about flying down to "teach that boy a lesson" when he was about to blow up that toy in his backyard. When other toys were clearly in jeopardy at Sid's house, why didn't Buzz spring into action there? 🤔