how intercept the enhanced navigation calls and show & hide a loader for anhanced navigation

Hi , i use thishttps://www.youtube.com/watch?v=JMcCtC-ZFV4 for intercept the enhanced navigation calls and show & hide a loader for anhanced navigation but just worked for first time it's means in first navigation just show loader topbar in next time dont show at all My https://github.com/MahdiElahi/EnhancedNavigation2 - Git what's problem ?