Is it me, or did they screw up Buzz's character?
In the previous films, once Buzz had realised and gotten over the fact that he was a toy, he seemed a natural and confident leader. One who would put his neck on the line, and wouldn't leave a toy behind.
In the fourth film he didn't come across like that. Once Woody was lost, he didn't seem to know what to do. He just floundered. It didn't help that they slightly overdid the 'inner voice' joke. It was funny the first couple of times, but it began to make him look a bit moronic towards the end. Buzz had never shown any reluctance to make decisions before.
Also, when Woody and Bo fell out about going back for Forky, Buzz at first wanted to give up. In the previous movies, I don't see that as being in character. He'd have stood with Woody.