Tim Allen is revealing the reason he says the Home Improvement reboot is “stuck.” During an interview with Us Weekly , the actor was asked for an update after sharing his hopes in recent years for a potential spinoff of the 1990s sitcom. “They keep talking about how it could move forward, but they get stuck [because] there are some personality problems right now with the boys,” Allen said, referring to the actors who played his onscreen sons in the show, Zachery Ty Bryan , Jonathan Taylor Thomas and Taran Noah Smith. “They’ve got their own issues,” the Toy Story voice actor added. “I always thought it would be cool if it was a story about them.…